diff --git a/changelog.d/12587.misc b/changelog.d/12587.misc
index d26e332305ce31222026affd46624959eae51a3f..3b466f1ddf168fe98f0e5052ff6e74c9ef2ded7f 100644
--- a/changelog.d/12587.misc
+++ b/changelog.d/12587.misc
@@ -1 +1 @@
-Add `@cancellable` decorator, for use on endpoint methods that can be cancelled when clients disconnect.
+Log status code of cancelled requests as 499 and avoid logging stack traces for them.
diff --git a/changelog.d/12663.misc b/changelog.d/12663.misc
new file mode 100644
index 0000000000000000000000000000000000000000..3b466f1ddf168fe98f0e5052ff6e74c9ef2ded7f
--- /dev/null
+++ b/changelog.d/12663.misc
@@ -0,0 +1 @@
+Log status code of cancelled requests as 499 and avoid logging stack traces for them.