Tags give the ability to mark specific points in history as being important
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v1.159.0rc1
e08ffd28 · ·Changelog: https://github.com/element-hq/synapse/blob/release-v1.159/CHANGES.md
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v1.158.0rc1
e4644ae2 · ·Changelog: https://github.com/element-hq/synapse/blob/release-v1.158/CHANGES.md
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v1.157.2
0c709bbb · ·This security release addresses several vulnerabilities. Please upgrade when you can, particularly if your homeserver participates in open federation and/or has untrusted local users. High severity: - Fix [ELEMENTSEC-2026-1071](https://github.com/element-hq/synapse/security/advisories/GHSA-fp53-rw9v-hcf9) - Fix [ELEMENTSEC-2024-1520](https://github.com/element-hq/synapse/security/advisories/GHSA-rgv2-84w7-5j9p) - Fix [ELEMENTSEC-2026-1717](https://github.com/element-hq/synapse/security/advisories/GHSA-27p5-4f45-gx76) - Fix [ELEMENTSEC-2026-1721](https://github.com/element-hq/synapse/security/advisories/GHSA-95fh-hv8c-chvq) - Fix [ELEMENTSEC-2026-1729](https://github.com/element-hq/synapse/security/advisories/GHSA-cjh7-rcpx-xpf8) - Fix [ELEMENTSEC-2026-1740](https://github.com/element-hq/synapse/security/advisories/GHSA-6wjm-9p2x-gvpm) Moderate severity: - Fix [ELEMENTSEC-2026-1714](https://github.com/element-hq/synapse/security/advisories/GHSA-qcjr-46gf-7f4r) - Fix [ELEMENTSEC-2026-1718](https://github.com/element-hq/synapse/security/advisories/GHSA-r66v-qhwx-8rg4) - Fix [ELEMENTSEC-2026-1751](https://github.com/element-hq/synapse/security/advisories/GHSA-jhcg-5392-5mjw) Low severity: - Fix [ELEMENTSEC-2026-1703](https://github.com/element-hq/synapse/security/advisories/GHSA-vh4c-pqh4-w3wq) - Fix [ELEMENTSEC-2026-1760](https://github.com/element-hq/synapse/security/advisories/GHSA-hgcg-p9gx-fq5f)
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v1.157.0
e0f251ce · ·- [MSC4140: Cancellable delayed events](https://github.com/matrix-org/matrix-spec-proposals/pull/4140): Limit how many delayed events a user may have scheduled at once. ([\#19539](https://github.com/element-hq/synapse/issues/19539)) - Support [MSC4446](https://github.com/matrix-org/matrix-spec-proposals/pull/4446) for moving fully read markers backwards. Contributed by @SpiritCroc @ Beeper. ([\#19663](https://github.com/element-hq/synapse/issues/19663)) - Add before and after time filters to the ['Redact events of a user'](https://element-hq.github.io/synapse/v1.157/admin_api/user_admin_api.html#redact-events-of-a-user) Admin API. ([\#19802](https://github.com/element-hq/synapse/issues/19802)) - Updated experimental support for [MSC4388: Secure out-of-band channel for sign in with QR](https://github.com/matrix-org/matrix-spec-proposals/pull/4388). ([\#19808](https://github.com/element-hq/synapse/issues/19808)) - Add an `exclude_rooms_from_presence` configuration option to stop presence being routed between users solely because they share one of the listed rooms. ([\#19935](https://github.com/element-hq/synapse/issues/19935)) - [MSC4140: Cancellable delayed events](https://github.com/matrix-org/matrix-spec-proposals/pull/4140): Update error responses to match their format in the current draft of the MSC. ([\#19539](https://github.com/element-hq/synapse/issues/19539)) - Lock Sliding Sync connections when inserting lazy members, to prevent repeated deadlocks. ([\#19826](https://github.com/element-hq/synapse/issues/19826)) - Fix the `flag_existing_quarantined_media` background update skipping some quarantined remote media. Introduced in v1.152.0. ([\#19901](https://github.com/element-hq/synapse/issues/19901)) - Fix a bug introduced in Synapse v1.150.0 where reactivating a deactivated and erased user did not restore their profile, breaking login, name changes, and invitations. Contributed by @m4us1ne. ([\#19902](https://github.com/element-hq/synapse/issues/19902)) - Fix a regression where application services that opted into ephemeral events using the legacy `de.sorunome.msc2409.push_ephemeral` registration flag stopped receiving ephemeral events (including to-device messages used for encryption). Introduced in v1.156.0. ([\#19928](https://github.com/element-hq/synapse/issues/19928)) - Fix a bug causing device list pruning to skip some rows when the transaction gets retried. ([\#19947](https://github.com/element-hq/synapse/issues/19947)) - Fix presence states being shown to clients forever after presence is disabled, by marking any previously only users as offline. ([\#19948](https://github.com/element-hq/synapse/issues/19948)) - Fix `SYNAPSE_ASYNC_IO_REACTOR=1` on Python 3.14. ([\#19949](https://github.com/element-hq/synapse/issues/19949)) - Remove support for experimental [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) auth delegation, in favour of the stable Matrix Authentication Service integration support. See [the upgrade notes](https://element-hq.github.io/synapse/v1.157/upgrade.html#upgrading-to-v11570). ([\#19895](https://github.com/element-hq/synapse/issues/19895)) - Port the synchronous core of client event serialization to Rust. ([\#19837](https://github.com/element-hq/synapse/issues/19837), [\#19922](https://github.com/element-hq/synapse/issues/19922)) - Update `HomeserverTestCase.get_success(...)` and friends to drive async Rust (Tokio runtime/thread pool). ([\#19871](https://github.com/element-hq/synapse/issues/19871), [\#19879](https://github.com/element-hq/synapse/issues/19879)) - Allow Rust code to have database access via Python database connection pool. ([\#19878](https://github.com/element-hq/synapse/issues/19878)) - Add `golangci-lint` to CI. ([\#19888](https://github.com/element-hq/synapse/issues/19888)) - Remove wall-clock dependency of `test_redact_messages_all_rooms` test, as this caused flakiness. ([\#19890](https://github.com/element-hq/synapse/issues/19890)) - Change the [MSC3814](https://github.com/matrix-org/matrix-spec-proposals/pull/3814) dehydrated device `/events` endpoint from `POST` to `GET`. ([\#19896](https://github.com/element-hq/synapse/issues/19896)) - Change the [MSC3814](https://github.com/matrix-org/matrix-spec-proposals/pull/3814) dehydrated device `/events` endpoint paging to match spec conventions. ([\#19897](https://github.com/element-hq/synapse/issues/19897)) - Fix storage type mismatches where values were bound with a type that didn't match their database column. ([\#19911](https://github.com/element-hq/synapse/issues/19911)) - Speed up deletion of old sliding sync connections by adding an index. ([\#19912](https://github.com/element-hq/synapse/issues/19912)) - Add note to 3PID email token request unit tests that the endpoint being tested can have an expected, artificial delay of up to 1s. ([\#19916](https://github.com/element-hq/synapse/issues/19916)) - Add an index to `sliding_sync_connection_lazy_members` to speed up deleting old sliding sync connection positions. ([\#19923](https://github.com/element-hq/synapse/issues/19923)) - Fix `test_lock_contention` being flaky when running against PostgreSQL by budgeting CPU time rather than wall-clock time. ([\#19929](https://github.com/element-hq/synapse/issues/19929)) - Fix Complement test flake when restarting Synapse workers (cross-test pollution caused by nginx upstreams being temporarily unavailable). ([\#19936](https://github.com/element-hq/synapse/issues/19936)) - Add clean deploy `FIXME` note for `TestOIDCProviderUnavailable` (problem tracked by [#19937](https://github.com/element-hq/synapse/issues/19937)). ([\#19938](https://github.com/element-hq/synapse/issues/19938)) - Minor presence performance improvements for large servers. ([\#19939](https://github.com/element-hq/synapse/issues/19939)) - Reduce replication traffic caused by presence. ([\#19941](https://github.com/element-hq/synapse/issues/19941)) - Add `last_active_granularity`, `sync_online_timeout` and `idle_timeout` options to the `presence` config section to allow tuning the presence state machine timers. ([\#19942](https://github.com/element-hq/synapse/issues/19942))
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v1.157.0rc1
e1420bec · ·Please check [the relevant section in the upgrade notes](https://github.com/element-hq/synapse/blob/develop/docs/upgrade.md#upgrading-to-v11570) as this release removes support for the deprecated MSC3861 Auth Delegation (`experimental_features.msc3861`). - [MSC4140: Cancellable delayed events](https://github.com/matrix-org/matrix-spec-proposals/pull/4140): Limit how many delayed events a user may have scheduled at once. ([\#19539](https://github.com/element-hq/synapse/issues/19539)) - Support [MSC4446](https://github.com/matrix-org/matrix-spec-proposals/pull/4446) for moving fully read markers backwards. Contributed by @SpiritCroc @ Beeper. ([\#19663](https://github.com/element-hq/synapse/issues/19663)) - Add before and after time filters to the ['Redact events of a user'](https://element-hq.github.io/synapse/v1.157/admin_api/user_admin_api.html#redact-events-of-a-user) Admin API. ([\#19802](https://github.com/element-hq/synapse/issues/19802)) - Updated experimental support for [MSC4388: Secure out-of-band channel for sign in with QR](https://github.com/matrix-org/matrix-spec-proposals/pull/4388). ([\#19808](https://github.com/element-hq/synapse/issues/19808)) - Add an `exclude_rooms_from_presence` configuration option to stop presence being routed between users solely because they share one of the listed rooms. ([\#19935](https://github.com/element-hq/synapse/issues/19935)) - [MSC4140: Cancellable delayed events](https://github.com/matrix-org/matrix-spec-proposals/pull/4140): Update error responses to match their format in the current draft of the MSC. ([\#19539](https://github.com/element-hq/synapse/issues/19539)) - Lock Sliding Sync connections when inserting lazy members, to prevent repeated deadlocks. ([\#19826](https://github.com/element-hq/synapse/issues/19826)) - Fix the `flag_existing_quarantined_media` background update skipping some quarantined remote media. Introduced in v1.152.0. ([\#19901](https://github.com/element-hq/synapse/issues/19901)) - Fix a bug introduced in Synapse v1.150.0 where reactivating a deactivated and erased user did not restore their profile, breaking login, name changes, and invitations. Contributed by @m4us1ne. ([\#19902](https://github.com/element-hq/synapse/issues/19902)) - Fix a regression where application services that opted into ephemeral events using the legacy `de.sorunome.msc2409.push_ephemeral` registration flag stopped receiving ephemeral events (including to-device messages used for encryption). Introduced in v1.156.0. ([\#19928](https://github.com/element-hq/synapse/issues/19928)) - Fix a bug causing device list pruning to skip some rows when the transaction gets retried. ([\#19947](https://github.com/element-hq/synapse/issues/19947)) - Fix presence states being shown to clients forever after presence is disabled, by marking any previously only users as offline. ([\#19948](https://github.com/element-hq/synapse/issues/19948)) - Fix `SYNAPSE_ASYNC_IO_REACTOR=1` on Python 3.14. ([\#19949](https://github.com/element-hq/synapse/issues/19949)) - Remove support for experimental [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) auth delegation, in favour of the stable Matrix Authentication Service integration support. See [the upgrade notes](https://element-hq.github.io/synapse/v1.157/upgrade.html#upgrading-to-v11570). ([\#19895](https://github.com/element-hq/synapse/issues/19895)) - Port the synchronous core of client event serialization to Rust. ([\#19837](https://github.com/element-hq/synapse/issues/19837), [\#19922](https://github.com/element-hq/synapse/issues/19922)) - Update `HomeserverTestCase.get_success(...)` and friends to drive async Rust (Tokio runtime/thread pool). ([\#19871](https://github.com/element-hq/synapse/issues/19871), [\#19879](https://github.com/element-hq/synapse/issues/19879)) - Allow Rust code to have database access via Python database connection pool. ([\#19878](https://github.com/element-hq/synapse/issues/19878)) - Add `golangci-lint` to CI. ([\#19888](https://github.com/element-hq/synapse/issues/19888)) - Remove wall-clock dependency of `test_redact_messages_all_rooms` test, as this caused flakiness. ([\#19890](https://github.com/element-hq/synapse/issues/19890)) - Change the [MSC3814](https://github.com/matrix-org/matrix-spec-proposals/pull/3814) dehydrated device `/events` endpoint from `POST` to `GET`. ([\#19896](https://github.com/element-hq/synapse/issues/19896)) - Change the [MSC3814](https://github.com/matrix-org/matrix-spec-proposals/pull/3814) dehydrated device `/events` endpoint paging to match spec conventions. ([\#19897](https://github.com/element-hq/synapse/issues/19897)) - Fix storage type mismatches where values were bound with a type that didn't match their database column. ([\#19911](https://github.com/element-hq/synapse/issues/19911)) - Speed up deletion of old sliding sync connections by adding an index. ([\#19912](https://github.com/element-hq/synapse/issues/19912)) - Add note to 3PID email token request unit tests that the endpoint being tested can have an expected, artificial delay of up to 1s. ([\#19916](https://github.com/element-hq/synapse/issues/19916)) - Add an index to `sliding_sync_connection_lazy_members` to speed up deleting old sliding sync connection positions. ([\#19923](https://github.com/element-hq/synapse/issues/19923)) - Fix `test_lock_contention` being flaky when running against PostgreSQL by budgeting CPU time rather than wall-clock time. ([\#19929](https://github.com/element-hq/synapse/issues/19929)) - Fix Complement test flake when restarting Synapse workers (cross-test pollution caused by nginx upstreams being temporarily unavailable). ([\#19936](https://github.com/element-hq/synapse/issues/19936)) - Add clean deploy `FIXME` note for `TestOIDCProviderUnavailable` (problem tracked by [#19937](https://github.com/element-hq/synapse/issues/19937)). ([\#19938](https://github.com/element-hq/synapse/issues/19938)) - Minor presence performance improvements for large servers. ([\#19939](https://github.com/element-hq/synapse/issues/19939)) - Reduce replication traffic caused by presence. ([\#19941](https://github.com/element-hq/synapse/issues/19941)) - Add `last_active_granularity`, `sync_online_timeout` and `idle_timeout` options to the `presence` config section to allow tuning the presence state machine timers. ([\#19942](https://github.com/element-hq/synapse/issues/19942))
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v1.156.0
be8d9004 · ·No significant changes since 1.156.0rc1. - Expose [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) over [MSC4186 (Simplified) Sliding Sync](https://github.com/matrix-org/matrix-spec-proposals/pull/4186). ([\#19591](https://github.com/element-hq/synapse/issues/19591)) - Stabilize support for sending ephemeral events to application services, as per [MSC2409](https://github.com/matrix-org/matrix-spec-proposals/pull/2409). Contributed by @jason-famedly @ Famedly. ([\#19758](https://github.com/element-hq/synapse/issues/19758)) - Include `allowed_room_ids` in the `/summary` client-server API response for rooms with restricted join rules, as required by Matrix 1.15. Contributed by @FrenchGithubUser @Famedly. ([\#19762](https://github.com/element-hq/synapse/issues/19762)) - [MSC4140: Cancellable delayed events](https://github.com/matrix-org/matrix-spec-proposals/pull/4140): Allow authentication on delayed event management endpoints (such as `/restart`) to bypass ratelimits for unauthenticated requests based on the client IP address. ([\#19794](https://github.com/element-hq/synapse/issues/19794)) - Add new metric `synapse_non_deactivated_user_count` which tracks the number of non-deactivated users in the database, split by `app_service`. ([\#19848](https://github.com/element-hq/synapse/issues/19848)) - The `GET /_matrix/client/unstable/org.matrix.msc1763/retention/configuration` endpoint is now provided when retention is enabled and `experimental_features.msc1763_enabled` is enabled, based on [MSC1763](https://github.com/matrix-org/matrix-spec-proposals/pull/1763). ([\#19853](https://github.com/element-hq/synapse/issues/19853)) - Add experimental support for [MSC4491: Invite reasons in room creation](https://github.com/matrix-org/matrix-spec-proposals/pull/4491). ([\#19874](https://github.com/element-hq/synapse/issues/19874)) - Provide remote servers a way to find out about an event created during the remote join handshake. Contributed by @FrenchGithubUser and @jason-famedly @ Famedly. ([\#19390](https://github.com/element-hq/synapse/issues/19390), [\#19855](https://github.com/element-hq/synapse/issues/19855), [\#19856](https://github.com/element-hq/synapse/issues/19856)) - Advertise `org.matrix.msc4143` in `unstable_features` when `msc4143_enabled` is set. ([\#19646](https://github.com/element-hq/synapse/issues/19646)) - Fix a long-standing bug where the badge notification count for a room could become permanently inflated if a read receipt was sent before the room's notification counts were first summarised. ([\#19785](https://github.com/element-hq/synapse/issues/19785)) - Fix startup listener logging to report the actual bound TCP port, so listeners configured with port `0` no longer log `Synapse now listening on TCP port 0`. ([\#19810](https://github.com/element-hq/synapse/issues/19810)) - Fix notification counts being inflated after a `/purge_history` when notifications had already been rotated into the summary table. ([\#19834](https://github.com/element-hq/synapse/issues/19834)) - Fix `/sync` caching transient errors for the `sync_response_cache_duration`. ([\#19845](https://github.com/element-hq/synapse/issues/19845)) - Fix local events being deleted by the [Purge History admin API](https://element-hq.github.io/synapse/v1.155/admin_api/purge_history_api.html) despite `delete_local_events` being set to false, in room versions other than 1 and 2. ([\#19850](https://github.com/element-hq/synapse/issues/19850)) - Fix a bug where a user's dehydrated device ([MSC3814](https://github.com/matrix-org/matrix-spec-proposals/pull/3814)) was deleted when their device list was synced from Matrix Authentication Service (e.g. upon logging out their last device), breaking offline key delivery. ([\#19892](https://github.com/element-hq/synapse/issues/19892)) - Update `auto_join_rooms` config documentation to cover requirements for auto-joining invite-only rooms. ([\#19660](https://github.com/element-hq/synapse/issues/19660)) - Add stable endpoint for [MSC3266: Room summary API](https://github.com/matrix-org/matrix-spec-proposals/pull/3266) into worker docs. Contributed by @olmari. ([\#19788](https://github.com/element-hq/synapse/issues/19788)) - Tweak wording of Rust crate dependency update policy. ([\#19829](https://github.com/element-hq/synapse/issues/19829)) - Fixed the Admin API user endpoint documentation examples to use JSON booleans (true/false) instead of numeric (0/1) values. ([\#19847](https://github.com/element-hq/synapse/issues/19847)) - Make `simple_select_one_onecol_txn()` more helpful by naming the table of the select - as all other query wrapper functions already did. ([\#19869](https://github.com/element-hq/synapse/issues/19869)) - Refactor `get_user_which_could_invite` logic to reuse `get_users_which_can_issue_invite`. Contributed by Noah Markert. ([\#19732](https://github.com/element-hq/synapse/issues/19732)) - Fix a flaky test (`twisted.protocols.amp.TooLong` error under `trial -jN`) caused by an oversized debug log line. ([\#19832](https://github.com/element-hq/synapse/issues/19832)) - Upload Complement test logs as CI artifacts instead of printing the raw output to the build log. ([\#19840](https://github.com/element-hq/synapse/issues/19840)) - Fix release script considering any workflow completion as successful. ([\#19843](https://github.com/element-hq/synapse/issues/19843)) - Force keyword-args for clear `default_config(server_name="test")` usage in test utilities. ([\#19849](https://github.com/element-hq/synapse/issues/19849)) - Add `.ruff_cache/` directory to `.gitignore`. ([\#19854](https://github.com/element-hq/synapse/issues/19854)) - Bump `poetry` in CI from `2.2.1` to `2.4.1`. ([\#19866](https://github.com/element-hq/synapse/issues/19866), [\#19877](https://github.com/element-hq/synapse/issues/19877)) - Split out `deferred` and `tokio_runtime` to their own Rust modules. ([\#19868](https://github.com/element-hq/synapse/issues/19868)) - Prevent the `cargo-test` and `cargo-bench` CI jobs from being skipped, even on PRs that have Rust changes. ([\#19883](https://github.com/element-hq/synapse/issues/19883))
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v1.156.0rc1
fd8f0e53 · ·- Expose [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) over [MSC4186 (Simplified) Sliding Sync](https://github.com/matrix-org/matrix-spec-proposals/pull/4186). ([\#19591](https://github.com/element-hq/synapse/issues/19591)) - Stabilize support for sending ephemeral events to application services, as per [MSC2409](https://github.com/matrix-org/matrix-spec-proposals/pull/2409). Contributed by @jason-famedly @ Famedly. ([\#19758](https://github.com/element-hq/synapse/issues/19758)) - Include `allowed_room_ids` in the `/summary` client-server API response for rooms with restricted join rules, as required by Matrix 1.15. Contributed by @FrenchGithubUser @Famedly. ([\#19762](https://github.com/element-hq/synapse/issues/19762)) - [MSC4140: Cancellable delayed events](https://github.com/matrix-org/matrix-spec-proposals/pull/4140): Allow authentication on delayed event management endpoints (such as `/restart`) to bypass ratelimits for unauthenticated requests based on the client IP address. ([\#19794](https://github.com/element-hq/synapse/issues/19794)) - Add new metric `synapse_non_deactivated_user_count` which tracks the number of non-deactivated users in the database, split by `app_service`. ([\#19848](https://github.com/element-hq/synapse/issues/19848)) - The `GET /_matrix/client/unstable/org.matrix.msc1763/retention/configuration` endpoint is now provided when retention is enabled and `experimental_features.msc1763_enabled` is enabled, based on [MSC1763](https://github.com/matrix-org/matrix-spec-proposals/pull/1763). ([\#19853](https://github.com/element-hq/synapse/issues/19853)) - Add experimental support for [MSC4491: Invite reasons in room creation](https://github.com/matrix-org/matrix-spec-proposals/pull/4491). ([\#19874](https://github.com/element-hq/synapse/issues/19874)) - Provide remote servers a way to find out about an event created during the remote join handshake. Contributed by @FrenchGithubUser and @jason-famedly @ Famedly. ([\#19390](https://github.com/element-hq/synapse/issues/19390), [\#19855](https://github.com/element-hq/synapse/issues/19855), [\#19856](https://github.com/element-hq/synapse/issues/19856)) - Advertise `org.matrix.msc4143` in `unstable_features` when `msc4143_enabled` is set. ([\#19646](https://github.com/element-hq/synapse/issues/19646)) - Fix a long-standing bug where the badge notification count for a room could become permanently inflated if a read receipt was sent before the room's notification counts were first summarised. ([\#19785](https://github.com/element-hq/synapse/issues/19785)) - Fix startup listener logging to report the actual bound TCP port, so listeners configured with port `0` no longer log `Synapse now listening on TCP port 0`. ([\#19810](https://github.com/element-hq/synapse/issues/19810)) - Fix notification counts being inflated after a `/purge_history` when notifications had already been rotated into the summary table. ([\#19834](https://github.com/element-hq/synapse/issues/19834)) - Fix `/sync` caching transient errors for the `sync_response_cache_duration`. ([\#19845](https://github.com/element-hq/synapse/issues/19845)) - Fix local events being deleted by the [Purge History admin API](https://element-hq.github.io/synapse/v1.155/admin_api/purge_history_api.html) despite `delete_local_events` being set to false, in room versions other than 1 and 2. ([\#19850](https://github.com/element-hq/synapse/issues/19850)) - Fix a bug where a user's dehydrated device ([MSC3814](https://github.com/matrix-org/matrix-spec-proposals/pull/3814)) was deleted when their device list was synced from Matrix Authentication Service (e.g. upon logging out their last device), breaking offline key delivery. ([\#19892](https://github.com/element-hq/synapse/issues/19892)) - Update `auto_join_rooms` config documentation to cover requirements for auto-joining invite-only rooms. ([\#19660](https://github.com/element-hq/synapse/issues/19660)) - Add stable endpoint for [MSC3266: Room summary API](https://github.com/matrix-org/matrix-spec-proposals/pull/3266) into worker docs. Contributed by @olmari. ([\#19788](https://github.com/element-hq/synapse/issues/19788)) - Tweak wording of Rust crate dependency update policy. ([\#19829](https://github.com/element-hq/synapse/issues/19829)) - Fixed the Admin API user endpoint documentation examples to use JSON booleans (true/false) instead of numeric (0/1) values. ([\#19847](https://github.com/element-hq/synapse/issues/19847)) - Make `simple_select_one_onecol_txn()` more helpful by naming the table of the select - as all other query wrapper functions already did. ([\#19869](https://github.com/element-hq/synapse/issues/19869)) - Refactor `get_user_which_could_invite` logic to reuse `get_users_which_can_issue_invite`. Contributed by Noah Markert. ([\#19732](https://github.com/element-hq/synapse/issues/19732)) - Fix a flaky test (`twisted.protocols.amp.TooLong` error under `trial -jN`) caused by an oversized debug log line. ([\#19832](https://github.com/element-hq/synapse/issues/19832)) - Upload Complement test logs as CI artifacts instead of printing the raw output to the build log. ([\#19840](https://github.com/element-hq/synapse/issues/19840)) - Fix release script considering any workflow completion as successful. ([\#19843](https://github.com/element-hq/synapse/issues/19843)) - Force keyword-args for clear `default_config(server_name="test")` usage in test utilities. ([\#19849](https://github.com/element-hq/synapse/issues/19849)) - Add `.ruff_cache/` directory to `.gitignore`. ([\#19854](https://github.com/element-hq/synapse/issues/19854)) - Bump `poetry` in CI from `2.2.1` to `2.4.1`. ([\#19866](https://github.com/element-hq/synapse/issues/19866), [\#19877](https://github.com/element-hq/synapse/issues/19877)) - Split out `deferred` and `tokio_runtime` to their own Rust modules. ([\#19868](https://github.com/element-hq/synapse/issues/19868)) - Prevent the `cargo-test` and `cargo-bench` CI jobs from being skipped, even on PRs that have Rust changes. ([\#19883](https://github.com/element-hq/synapse/issues/19883))
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v1.155.0
3fad6368 · ·The next version of Synapse will not include Debian packages for Debian 12 Bookworm as it reached end of life on the 10th of June 2026. - When building releases, don't cancel Debian package builds when one of them fails. ([\#19842](https://github.com/element-hq/synapse/issues/19842)) - Limit the to-device EDU size to a reasonable value to mitigate long queues of to-device messages preventing outgoing federation because of the size of the transaction. ([\#19617](https://github.com/element-hq/synapse/issues/19617)) - Work around bug that sometimes breaks joining restricted rooms that require a remote join. Contributed by @tulir @ Beeper. ([\#19730](https://github.com/element-hq/synapse/issues/19730)) - Update Sliding Sync to return a new response immediately if a room subscription has changed and produced a new response. ([\#19734](https://github.com/element-hq/synapse/issues/19734), [\#19792](https://github.com/element-hq/synapse/issues/19792)) - Fix the `/capabilities` endpoint returning a 500 error on non-media workers when [MSC4452: Preview URL capabilities API](https://github.com/matrix-org/matrix-spec-proposals/pull/4452) is enabled. ([\#19839](https://github.com/element-hq/synapse/issues/19839)) - Document how to see Rust build failure output when using `poetry install`. ([\#19818](https://github.com/element-hq/synapse/issues/19818)) - Document that the SQLite version included in Ubuntu LTS, aside from ESM-only versions, is included in our support policy. ([\#19823](https://github.com/element-hq/synapse/issues/19823)) - Port the Python Event classes to Rust. ([\#19701](https://github.com/element-hq/synapse/issues/19701), [\#19816](https://github.com/element-hq/synapse/issues/19816), [\#19817](https://github.com/element-hq/synapse/issues/19817), [\#19819](https://github.com/element-hq/synapse/issues/19819)) - Added tests to ensure that email notification links are sanitized. Contributed by Noah Markert. ([\#19741](https://github.com/element-hq/synapse/issues/19741)) - Add `GcpJsonFormatter` logging formatter for use with Google Cloud Logging and GKE deployments. ([\#19775](https://github.com/element-hq/synapse/issues/19775)) - Add more logging to the to-device message replication stream. ([\#19801](https://github.com/element-hq/synapse/issues/19801), [\#19821](https://github.com/element-hq/synapse/issues/19821)) - Port `Requester` class to Rust. ([\#19828](https://github.com/element-hq/synapse/issues/19828))
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v1.155.0rc1
f53f1044 · ·- Limit the to-device EDU size to a reasonable value to mitigate long queues of to-device messages preventing outgoing federation because of the size of the transaction. ([\#19617](https://github.com/element-hq/synapse/issues/19617)) - Work around bug that sometimes breaks joining restricted rooms that require a remote join. Contributed by @tulir @ Beeper. ([\#19730](https://github.com/element-hq/synapse/issues/19730)) - Update Sliding Sync to return a new response immediately if a room subscription has changed and produced a new response. ([\#19734](https://github.com/element-hq/synapse/issues/19734), [\#19792](https://github.com/element-hq/synapse/issues/19792)) - Fix the `/capabilities` endpoint returning a 500 error on non-media workers when [MSC4452: Preview URL capabilities API](https://github.com/matrix-org/matrix-spec-proposals/pull/4452) is enabled. ([\#19839](https://github.com/element-hq/synapse/issues/19839)) - Document how to see Rust build failure output when using `poetry install`. ([\#19818](https://github.com/element-hq/synapse/issues/19818)) - Document that the SQLite version included in Ubuntu LTS, aside from ESM-only versions, is included in our support policy. ([\#19823](https://github.com/element-hq/synapse/issues/19823)) - Port the Python Event classes to Rust. ([\#19701](https://github.com/element-hq/synapse/issues/19701), [\#19816](https://github.com/element-hq/synapse/issues/19816), [\#19817](https://github.com/element-hq/synapse/issues/19817), [\#19819](https://github.com/element-hq/synapse/issues/19819)) - Added tests to ensure that email notification links are sanitized. Contributed by Noah Markert. ([\#19741](https://github.com/element-hq/synapse/issues/19741)) - Add `GcpJsonFormatter` logging formatter for use with Google Cloud Logging and GKE deployments. ([\#19775](https://github.com/element-hq/synapse/issues/19775)) - Add more logging to the to-device message replication stream. ([\#19801](https://github.com/element-hq/synapse/issues/19801), [\#19821](https://github.com/element-hq/synapse/issues/19821)) - Port `Requester` class to Rust. ([\#19828](https://github.com/element-hq/synapse/issues/19828))
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v1.154.0
102fb6e8 · ·No significant changes since 1.154.0rc1. - Add support for [MSC4452: Preview URL capabilities API](https://github.com/matrix-org/matrix-spec-proposals/pull/4452) which exposes a `io.element.msc4452.preview_url` capability. If `experimental_features.msc4452_enabled` is `true`, the `/_matrix/(client/v1/media|media/v3)/preview_url` endpoint now responds with a 403 status code when the capability is disabled. ([\#19715](https://github.com/element-hq/synapse/issues/19715)) - Fix a bug in [MSC4186: Simplified Sliding Sync](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) that could prevent user avatars from showing if the room had an empty name. ([\#19468](https://github.com/element-hq/synapse/issues/19468), [\#19791](https://github.com/element-hq/synapse/issues/19791)) - Fix access token cache not being invalidated for sessions using refresh tokens. Contributed by @FrenchGithubUser @ Famedly. ([\#19483](https://github.com/element-hq/synapse/issues/19483)) - Fix bug where Synapse would return 400 (`M_BAD_JSON`) when sending a message with a `mentions` field and Synapse module `check_event_allowed` callback registered (frozen event). Contributed by @gaetan-sbt. ([\#19634](https://github.com/element-hq/synapse/issues/19634)) - Fix long-standing but niche bug with `/sync` where it could attempt to fetch data with flawed invalid future tokens. ([\#19644](https://github.com/element-hq/synapse/issues/19644)) - Fix `/sync` failing when [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) are enabled and the sync request filters out Ephemeral Data Units (EDUs). ([\#19787](https://github.com/element-hq/synapse/issues/19787)) - Fix packaging for Fedora and EPEL caused by unnecessary bumping `attrs` minimum version requirement in `pyproject.toml` file. Contributed by Oleg Girko. ([\#19789](https://github.com/element-hq/synapse/issues/19789)) - Fix merging signatures when a policy server is running under the same server name as Synapse. The bug was re-introduced in v1.153.0rc1 after being fixed earlier in v1.151.0rc1. Contributed by @tulir @ Beeper. ([\#19797](https://github.com/element-hq/synapse/issues/19797)) - Added details about how Synapse syncs the picture claim when `update_profile_information` setting is true. ([\#19508](https://github.com/element-hq/synapse/issues/19508)) - Port `Event.content` field to Rust. ([\#19725](https://github.com/element-hq/synapse/issues/19725)) - Prefer close backfill points (absolute distance). ([\#19748](https://github.com/element-hq/synapse/issues/19748)) - Replace unique `quarantined_media` waiting patterns with standard `wait_for_stream_token(...)`. ([\#19764](https://github.com/element-hq/synapse/issues/19764)) - Improve Synapse logging around when someone encounters `We can't get valid state history.` so you can correlate everything by `event_id`. ([\#19765](https://github.com/element-hq/synapse/issues/19765)) - Tidy up Rust `RoomVersion` structs. ([\#19766](https://github.com/element-hq/synapse/issues/19766)) - Update `WorkerLock` tests to better stress the `WORKER_LOCK_MAX_RETRY_INTERVAL`. ([\#19772](https://github.com/element-hq/synapse/issues/19772)) - Refactor [MSC4242: State DAG](https://github.com/matrix-org/matrix-spec-proposals/pull/4242) checks behind a single `TypeIs` helper to avoid scattered `isinstance` casts. ([\#19774](https://github.com/element-hq/synapse/issues/19774)) - Use `StrCollection` for `prev_state_events`. ([\#19777](https://github.com/element-hq/synapse/issues/19777)) - Fix up the construction of events in tests, ahead of the Rust event port. ([\#19781](https://github.com/element-hq/synapse/issues/19781))
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v1.154.0rc1
f9f08db4 · ·- Add support for [MSC4452: Preview URL capabilities API](https://github.com/matrix-org/matrix-spec-proposals/pull/4452) which exposes a `io.element.msc4452.preview_url` capability. If `experimental_features.msc4452_enabled` is `true`, the `/_matrix/(client/v1/media|media/v3)/preview_url` endpoint now responds with a 403 status code when the capability is disabled. ([\#19715](https://github.com/element-hq/synapse/issues/19715)) - Fix a bug in [MSC4186: Simplified Sliding Sync](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) that could prevent user avatars from showing if the room had an empty name. ([\#19468](https://github.com/element-hq/synapse/issues/19468), [\#19791](https://github.com/element-hq/synapse/issues/19791)) - Fix access token cache not being invalidated for sessions using refresh tokens. Contributed by @FrenchGithubUser @ Famedly. ([\#19483](https://github.com/element-hq/synapse/issues/19483)) - Fix bug where Synapse would return 400 (`M_BAD_JSON`) when sending a message with a `mentions` field and Synapse module `check_event_allowed` callback registered (frozen event). Contributed by @gaetan-sbt. ([\#19634](https://github.com/element-hq/synapse/issues/19634)) - Fix long-standing but niche bug with `/sync` where it could attempt to fetch data with flawed invalid future tokens. ([\#19644](https://github.com/element-hq/synapse/issues/19644)) - Fix `/sync` failing when [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) are enabled and the sync request filters out Ephemeral Data Units (EDUs). ([\#19787](https://github.com/element-hq/synapse/issues/19787)) - Fix packaging for Fedora and EPEL caused by unnecessary bumping `attrs` minimum version requirement in `pyproject.toml` file. Contributed by Oleg Girko. ([\#19789](https://github.com/element-hq/synapse/issues/19789)) - Fix merging signatures when a policy server is running under the same server name as Synapse. The bug was re-introduced in v1.153.0rc1 after being fixed earlier in v1.151.0rc1. Contributed by @tulir @ Beeper. ([\#19797](https://github.com/element-hq/synapse/issues/19797)) - Added details about how Synapse syncs the picture claim when `update_profile_information` setting is true. ([\#19508](https://github.com/element-hq/synapse/issues/19508)) - Port `Event.content` field to Rust. ([\#19725](https://github.com/element-hq/synapse/issues/19725)) - Prefer close backfill points (absolute distance). ([\#19748](https://github.com/element-hq/synapse/issues/19748)) - Replace unique `quarantined_media` waiting patterns with standard `wait_for_stream_token(...)`. ([\#19764](https://github.com/element-hq/synapse/issues/19764)) - Improve Synapse logging around when someone encounters `We can't get valid state history.` so you can correlate everything by `event_id`. ([\#19765](https://github.com/element-hq/synapse/issues/19765)) - Tidy up Rust `RoomVersion` structs. ([\#19766](https://github.com/element-hq/synapse/issues/19766)) - Update `WorkerLock` tests to better stress the `WORKER_LOCK_MAX_RETRY_INTERVAL`. ([\#19772](https://github.com/element-hq/synapse/issues/19772)) - Refactor [MSC4242: State DAG](https://github.com/matrix-org/matrix-spec-proposals/pull/4242) checks behind a single `TypeIs` helper to avoid scattered `isinstance` casts. ([\#19774](https://github.com/element-hq/synapse/issues/19774)) - Use `StrCollection` for `prev_state_events`. ([\#19777](https://github.com/element-hq/synapse/issues/19777)) - Fix up the construction of events in tests, ahead of the Rust event port. ([\#19781](https://github.com/element-hq/synapse/issues/19781))
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v1.153.0
7b1c4da5 · ·No significant changes since 1.153.0rc3. - Revert 'Have [MSC4186: Simplified Sliding Sync](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) return a new response immediately if a room subscription has changed and produced a new response. ([\#19714](https://github.com/element-hq/synapse/issues/19714))' (introduced in 1.153.0rc1) due to performance problems. ([\#19784](https://github.com/element-hq/synapse/issues/19784)) - Correctly handle arbitrary precision integers in `unsigned` field of events. The bug was introduced in 1.153.0rc1. ([\#19769](https://github.com/element-hq/synapse/issues/19769)) - Make ACLs apply to EDUs per [MSC4163](https://github.com/matrix-org/matrix-spec-proposals/pull/4163). ([\#18475](https://github.com/element-hq/synapse/issues/18475)) - Stabilize [MSC3266: Room summary API](https://github.com/matrix-org/matrix-spec-proposals/pull/3266), removing the experimental config flag `msc3266_enabled`. Contributed by @dasha-uwu. ([\#19720](https://github.com/element-hq/synapse/issues/19720)) - Partial [MSC4311](https://github.com/matrix-org/matrix-spec-proposals/pull/4311) implementation: `m.room.create` is now a required part of stripped `invite_state`/`knock_state` . Contributed by @FrenchGithubUser @Famedly. ([\#19722](https://github.com/element-hq/synapse/issues/19722)) - Expose `tombstoned` and `replacement_room` in room details on admin API endpoint `GET /_synapse/admin/v1/rooms/<room_id>`. Contributed by Noah Markert. ([\#19737](https://github.com/element-hq/synapse/issues/19737)) - Allow self-requested user erasure (upon account deactivation) to succeed even if Synapse has disabled profile changes. Contributed by Famedly. ([\#19398](https://github.com/element-hq/synapse/issues/19398)) - Fix Synapse not backfilling new history when attempting to use a pagination token near a backward extremity. ([\#19611](https://github.com/element-hq/synapse/issues/19611)) - Have [MSC4186: Simplified Sliding Sync](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) return a new response immediately if a room subscription has changed and produced a new response. ([\#19714](https://github.com/element-hq/synapse/issues/19714)) - Fix a bug where when upgrading a room to room version 12, the power level event in the old room got temporarily mutated to remove the user upgrading the room's power. ([\#19727](https://github.com/element-hq/synapse/issues/19727)) - Fix packaging for Fedora and EPEL caused by unnecessary bumping `authlib` minimum version requirement in `pyproject.toml` file. Contributed by Oleg Girko. ([\#19742](https://github.com/element-hq/synapse/issues/19742)) - Add warning about known problems when configuring `use_frozen_dicts`. ([\#19711](https://github.com/element-hq/synapse/issues/19711)) - Port `Event.signatures` field to Rust. ([\#19706](https://github.com/element-hq/synapse/issues/19706)) - Port `Event.unsigned` field to Rust. ([\#19708](https://github.com/element-hq/synapse/issues/19708)) - Add a Rust canonical JSON serializer. ([\#19739](https://github.com/element-hq/synapse/issues/19739), [\#19763](https://github.com/element-hq/synapse/issues/19763)) - Configure Dependabot to only update Python dependencies in the lockfile, unless widening upper bounds. ([\#19743](https://github.com/element-hq/synapse/issues/19743)) - Reduce `WORKER_LOCK_MAX_RETRY_INTERVAL` to 5 seconds to reduce idle time after lock is released. ([\#19755](https://github.com/element-hq/synapse/issues/19755)) - Force keyword-only arguments for `Duration` so time units have to be specified. ([\#19756](https://github.com/element-hq/synapse/issues/19756))