# Synapse 1.151.0 (2026-04-07) ## Bugfixes - Fix `KNOWN_ROOM_VERSIONS.__contains__` raising `TypeError` for non-string keys, which could cause `/sync` to fail for rooms with a `NULL` room version in the database. Bug introduced in [#19589](https://github.com/element-hq/synapse/pull/19589) as part of v1.151.0rc1. ([\#19649](https://github.com/element-hq/synapse/issues/19649)) # Synapse 1.151.0rc1 (2026-03-31) ## Features - Add stable support for [MSC4284](https://github.com/matrix-org/matrix-spec-proposals/pull/4284) Policy Servers. ([\#19503](https://github.com/element-hq/synapse/issues/19503)) - Update and stabilize support for [MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666): Get rooms in common with another user. Contributed by @tulir @ Beeper. ([\#19511](https://github.com/element-hq/synapse/issues/19511)) - 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). ([\#19573](https://github.com/element-hq/synapse/issues/19573)) - Stabilize `room_version` and `encryption` fields in the space/room `/hierarchy` API (part of [MSC3266](https://github.com/matrix-org/matrix-spec-proposals/pull/3266)). ([\#19576](https://github.com/element-hq/synapse/issues/19576)) - Introduce a [configuration option](https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#matrix_authentication_service) to allow using HTTP/2 over plaintext when Synapse connects to Matrix Authentication Service. ([\#19586](https://github.com/element-hq/synapse/issues/19586)) ## Bugfixes - Fix [MSC4284](https://github.com/matrix-org/matrix-spec-proposals/pull/4284) Policy Servers implementation to skip signing `org.matrix.msc4284.policy` and `m.room.policy` state events. ([\#19503](https://github.com/element-hq/synapse/issues/19503)) - Correctly apply [MSC4284](https://github.com/matrix-org/matrix-spec-proposals/pull/4284) Policy Server signatures to events when the sender and policy server have the same server name. ([\#19503](https://github.com/element-hq/synapse/issues/19503)) - Allow Synapse to start up even when discovery fails for an OpenID Connect provider. ([\#19509](https://github.com/element-hq/synapse/issues/19509)) - Fix quarantine media admin APIs sometimes returning inaccurate counts for remote media. ([\#19559](https://github.com/element-hq/synapse/issues/19559)) - Fix `Build and push complement image` CI job not having `poetry` available for the Complement runner script. ([\#19578](https://github.com/element-hq/synapse/issues/19578)) - Increase timeout for policy server requests to avoid repeated requests for checking media. ([\#19629](https://github.com/element-hq/synapse/issues/19629)) ## Deprecations and Removals - Remove support for [MSC3852: Expose user agent information on Device](https://github.com/matrix-org/matrix-spec-proposals/pull/3852) as the MSC was closed. ([\#19430](https://github.com/element-hq/synapse/issues/19430)) ## Internal Changes - Fix small comment typo in config output from the `demo/start.sh` script. ([\#19538](https://github.com/element-hq/synapse/issues/19538)) - Add MSC3820 comment context to `RoomVersion` attributes. ([\#19577](https://github.com/element-hq/synapse/issues/19577)) - Remove `redacted_because` from internal unsigned. ([\#19581](https://github.com/element-hq/synapse/issues/19581)) - Prevent sending registration emails if registration is disabled. ([\#19585](https://github.com/element-hq/synapse/issues/19585)) - Port `RoomVersion` to Rust. ([\#19589](https://github.com/element-hq/synapse/issues/19589)) - Only show failing Complement tests in the formatted output in CI. ([\#19590](https://github.com/element-hq/synapse/issues/19590)) - Ensure old Complement test files are removed when downloading a Complement checkout via `./scripts-dev/complement.sh`. ([\#19592](https://github.com/element-hq/synapse/issues/19592)) - Update `HomeserverTestCase.pump()` docstring to demystify behavior (Twisted reactor/clock). ([\#19602](https://github.com/element-hq/synapse/issues/19602)) - Deprecate `HomeserverTestCase.pump()` in favor of more direct `HomeserverTestCase.reactor.advance(...)` usage. ([\#19602](https://github.com/element-hq/synapse/issues/19602)) - Lower the Postgres database `statement_timeout` to 10m (previously 1h). ([\#19604](https://github.com/element-hq/synapse/issues/19604))

# Synapse 1.147.1 (2026-02-12) - Block federation requests and events authenticated using a known insecure signing key. See [CVE-2026-24044](https://www.cve.org/CVERecord?id=CVE-2026-24044) / [ELEMENTSEC-2025-1670](https://github.com/element-hq/ess-helm/security/advisories/GHSA-qwcj-h6m8-vp6q). ([\#19459](https://github.com/element-hq/synapse/issues/19459))

# Synapse 1.146.0rc1 (2026-01-20) ## Deprecations and Removals - [MSC2697](https://github.com/matrix-org/matrix-spec-proposals/pull/2697) (Dehydrated devices) has been removed, as the MSC is closed. Developers should migrate to [MSC3814](https://github.com/matrix-org/matrix-spec-proposals/pull/3814). ([\#19346](https://github.com/element-hq/synapse/issues/19346)) - Support for Ubuntu 25.04 (Plucky Puffin) has been dropped. Synapse no longer builds debian packages for Ubuntu 25.04. ## Features - Add a new config option [`enable_local_media_storage`](https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#enable_local_media_storage) which controls whether media is additionally stored locally when using configured `media_storage_providers`. Setting this to `false` allows off-site media storage without a local cache. Contributed by Patrice Brend'amour @dr.allgood. ([\#19204](https://github.com/element-hq/synapse/issues/19204)) - Stabilise support for [MSC4312](https://github.com/matrix-org/matrix-spec-proposals/pull/4312)'s `m.oauth` User-Interactive Auth stage for resetting cross-signing identity with the OAuth 2.0 API. The old, unstable name (`org.matrix.cross_signing_reset`) is now deprecated and will be removed in a future release. ([\#19273](https://github.com/element-hq/synapse/issues/19273)) - Refactor Grafana dashboard to use `server_name` label (instead of `instance`). ([\#19337](https://github.com/element-hq/synapse/issues/19337)) ## Bugfixes - Fix joining a restricted v12 room locally when no local room creator is present but local users with sufficient power levels are. Contributed by @nexy7574. ([\#19321](https://github.com/element-hq/synapse/issues/19321)) - Fixed parallel calls to `/_matrix/media/v1/create` being ratelimited for appservices even if `rate_limited: false` was set in the registration. Contributed by @tulir @ Beeper. ([\#19335](https://github.com/element-hq/synapse/issues/19335)) - Fix a bug introduced in 1.61.0 where a user's membership in a room was accidentally ignored when considering access to historical state events in rooms with the "shared" history visibility. Contributed by Lukas Tautz. ([\#19353](https://github.com/element-hq/synapse/issues/19353)) - [MSC4140](https://github.com/matrix-org/matrix-spec-proposals/pull/4140): Store the JSON content of scheduled delayed events as text instead of a byte array. This fixes the inability to schedule a delayed event with non-ASCII characters in its content. ([\#19360](https://github.com/element-hq/synapse/issues/19360)) - Always rollback database transactions when retrying (avoid orphaned connections). ([\#19372](https://github.com/element-hq/synapse/issues/19372)) - Fix `InFlightGauge` typing to allow upgrading to `prometheus_client` 0.24. ([\#19379](https://github.com/element-hq/synapse/issues/19379)) ## Updates to the Docker image - Add [Prometheus HTTP service discovery](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#http_sd_config) endpoint for easy discovery of all workers when using the `docker/Dockerfile-workers` image (see the [*Metrics* section of our Docker testing docs](docker/README-testing.md#metrics)). ([\#19336](https://github.com/element-hq/synapse/issues/19336)) ## Improved Documentation - Remove docs on legacy metric names (no longer in the codebase since 2022-12-06). ([\#19341](https://github.com/element-hq/synapse/issues/19341)) - Clarify how the estimated value of room complexity is calculated internally. ([\#19384](https://github.com/element-hq/synapse/issues/19384)) ## Internal Changes - Add an internal `cancel_task` API to the task scheduler. ([\#19310](https://github.com/element-hq/synapse/issues/19310)) - Tweak docstrings and signatures of `auth_types_for_event` and `get_catchup_room_event_ids`. ([\#19320](https://github.com/element-hq/synapse/issues/19320)) - Replace usage of deprecated `assertEquals` with `assertEqual` in unit test code. ([\#19345](https://github.com/element-hq/synapse/issues/19345)) - Drop support for Ubuntu 25.04 'Plucky Puffin', add support for Ubuntu 25.10 'Questing Quokka'. ([\#19348](https://github.com/element-hq/synapse/issues/19348)) - Revert "Add an Admin API endpoint for listing quarantined media (#19268)". ([\#19351](https://github.com/element-hq/synapse/issues/19351)) - Bump `mdbook` from 0.4.17 to 0.5.2 and remove our custom table-of-contents plugin in favour of the new default functionality. ([\#19356](https://github.com/element-hq/synapse/issues/19356)) - Replace deprecated usage of PyGitHub's `GitRelease.title` with `.name` in release script. ([\#19358](https://github.com/element-hq/synapse/issues/19358)) - Update the Element logo in Synapse's README to be an absolute URL, allowing it to render on other sites (such as PyPI). ([\#19368](https://github.com/element-hq/synapse/issues/19368)) - Apply minor tweaks to v1.145.0 changelog. ([\#19376](https://github.com/element-hq/synapse/issues/19376)) - Update Grafana dashboard syntax to use the latest from importing/exporting with Grafana 12.3.1. ([\#19381](https://github.com/element-hq/synapse/issues/19381)) - Warn about skipping reactor metrics when using unknown reactor type. ([\#19383](https://github.com/element-hq/synapse/issues/19383)) - Add support for reactor metrics with the `ProxiedReactor` used in worker Complement tests. ([\#19385](https://github.com/element-hq/synapse/issues/19385))

# Synapse 1.142.0 (2025-11-11) ## Dropped support for Python 3.9 This release drops support for Python 3.9, in line with our [dependency deprecation policy](https://element-hq.github.io/synapse/latest/deprecation_policy.html#platform-dependencies), as it is now [end of life](https://endoflife.date/python). ## SQLite 3.40.0+ is now required The minimum supported SQLite version has been increased from 3.27.0 to 3.40.0. If you use current versions of the [matrixorg/synapse](setup/installation.html#docker-images-and-ansible-playbooks) Docker images, no action is required. ## Deprecation of MacOS Python wheels The team has decided to deprecate and eventually stop publishing python wheels for MacOS. This is a burden on the team, and we're not aware of any parties that use them. Synapse docker images will continue to work on MacOS, as will building Synapse from source (though note this requires a Rust compiler). At present, publishing MacOS Python wheels will continue for the next release (1.143.0), but will not be available after that (1.144.0+). If you do make use of these wheels downstream, please reach out to us in [#synapse-dev:matrix.org](https://matrix.to/#/#synapse-dev:matrix.org). We'd love to hear from you! ## Internal Changes - Properly stop building wheels for Python 3.9 and free-threaded CPython. ([\#19154](https://github.com/element-hq/synapse/issues/19154)) # Synapse 1.142.0rc4 (2025-11-07) ## Bugfixes - Fix a bug introduced in 1.142.0rc1 where any attempt to configure `matrix_authentication_service.secret_path` would prevent the homeserver from starting up. ([\#19144](https://github.com/element-hq/synapse/issues/19144)) # Synapse 1.142.0rc3 (2025-11-04) ## Internal Changes - Update release scripts to prevent building wheels for free-threaded Python, as Synapse does not currently support it. ([\#19140](https://github.com/element-hq/synapse/issues/19140)) # Synapse 1.142.0rc2 (2025-11-04) ## Internal Changes - Manually skip building Python 3.9 wheels, to prevent errors in the release workflow. ([\#19119](https://github.com/element-hq/synapse/issues/19119)) # Synapse 1.142.0rc1 (2025-11-04) ## Features - Add support for Python 3.14. ([\#19055](https://github.com/element-hq/synapse/issues/19055), [\#19134](https://github.com/element-hq/synapse/issues/19134)) - Add an [Admin API](https://element-hq.github.io/synapse/latest/usage/administration/admin_api/index.html) to allow an admin to fetch the space/room hierarchy for a given space. ([\#19021](https://github.com/element-hq/synapse/issues/19021)) ## Bugfixes - Fix a bug introduced in 1.111.0 where failed attempts to download authenticated remote media would not be handled correctly. ([\#19062](https://github.com/element-hq/synapse/issues/19062)) - Update the `oidc_session_no_samesite` cookie to have the `Secure` attribute, so the only difference between it and the paired `oidc_session` cookie, is the configuration of the `SameSite` attribute as described in the comments / cookie names. Contributed by @kieranlane. ([\#19079](https://github.com/element-hq/synapse/issues/19079)) - Fix a bug introduced in 1.140.0 where lost logcontext warnings would be emitted from timeouts in sync and requests made by Synapse itself. ([\#19090](https://github.com/element-hq/synapse/issues/19090)) - Fix a bug introdued in 1.140.0 where lost logcontext warning were emitted when using `HomeServer.shutdown()`. ([\#19108](https://github.com/element-hq/synapse/issues/19108)) ## Improved Documentation - Update the link to the Debian oldstable package for SQLite. ([\#19047](https://github.com/element-hq/synapse/issues/19047)) - Point out additional Redis configuration options available in the worker docs. Contributed by @servisbryce. ([\#19073](https://github.com/element-hq/synapse/issues/19073)) - Update the list of Debian releases that the downstream Debian package is maintained for. ([\#19100](https://github.com/element-hq/synapse/issues/19100)) - Add [a page](https://element-hq.github.io/synapse/latest/development/internal_documentation/release_notes_review_checklist.html) to the documentation describing the steps the Synapse team takes to review the release notes before publishing them. ([\#19109](https://github.com/element-hq/synapse/issues/19109)) ## Deprecations and Removals - Drop support for Python 3.9. ([\#19099](https://github.com/element-hq/synapse/issues/19099)) - Remove support for SQLite < 3.37.2. ([\#19047](https://github.com/element-hq/synapse/issues/19047)) ## Internal Changes - Fix CI linter for schema delta files to correctly handle all types of `CREATE TABLE` syntax. ([\#19020](https://github.com/element-hq/synapse/issues/19020)) - Use type hinting generics in standard collections, as per [PEP 585](https://peps.python.org/pep-0585/), added in Python 3.9. ([\#19046](https://github.com/element-hq/synapse/issues/19046)) - Always treat `RETURNING` as supported by SQL engines, now that the minimum-supported versions of both SQLite and PostgreSQL support it. ([\#19047](https://github.com/element-hq/synapse/issues/19047)) - Move `oidc.load_metadata()` startup into `_base.start()`. ([\#19056](https://github.com/element-hq/synapse/issues/19056)) - Remove logcontext problems caused by awaiting raw `deferLater(...)`. ([\#19058](https://github.com/element-hq/synapse/issues/19058)) - Prevent duplicate logging setup when running multiple Synapse instances. ([\#19067](https://github.com/element-hq/synapse/issues/19067)) - Be mindful of other logging context filters in 3rd-party code and avoid overwriting log record fields unless we know the log record is relevant to Synapse. ([\#19068](https://github.com/element-hq/synapse/issues/19068)) - Update pydantic to v2. ([\#19071](https://github.com/element-hq/synapse/issues/19071)) - Update deprecated code in the release script to prevent a warning message from being printed. ([\#19080](https://github.com/element-hq/synapse/issues/19080)) - Update the deprecated poetry development dependencies group name in `pyproject.toml`. ([\#19081](https://github.com/element-hq/synapse/issues/19081)) - Remove `pp38*` skip selector from cibuildwheel to silence warning. ([\#19085](https://github.com/element-hq/synapse/issues/19085)) - Don't immediately exit the release script if the checkout is dirty. Instead, allow the user to clear the dirty changes and retry. ([\#19088](https://github.com/element-hq/synapse/issues/19088)) - Update the release script's generated announcement text to include a title and extra text for RC's. ([\#19089](https://github.com/element-hq/synapse/issues/19089)) - Fix lints on main branch. ([\#19092](https://github.com/element-hq/synapse/issues/19092)) - Use cheaper random string function in logcontext utilities. ([\#19094](https://github.com/element-hq/synapse/issues/19094)) - Avoid clobbering other `SIGHUP` handlers in 3rd-party code. ([\#19095](https://github.com/element-hq/synapse/issues/19095)) - Prevent duplicate GitHub draft releases being created during the Synapse release process. ([\#19096](https://github.com/element-hq/synapse/issues/19096)) - Use Pillow's `Image.getexif` method instead of the experimental `Image._getexif`. ([\#19098](https://github.com/element-hq/synapse/issues/19098)) - Prevent uv `/usr/local/.lock` file from appearing in built Synapse docker images. ([\#19107](https://github.com/element-hq/synapse/issues/19107)) - Allow Synapse's runtime dependency checking code to take packaging markers (i.e. `python <= 3.14`) into account when checking dependencies. ([\#19110](https://github.com/element-hq/synapse/issues/19110)) - Move exception handling up the stack (avoid `exit(1)` in our composable functions). ([\#19116](https://github.com/element-hq/synapse/issues/19116)) - Fix a lint error related to lifetimes in Rust 1.90. ([\#19118](https://github.com/element-hq/synapse/issues/19118)) - Refactor and align app entrypoints (avoid `exit(1)` in our composable functions). ([\#19121](https://github.com/element-hq/synapse/issues/19121), [\#19131](https://github.com/element-hq/synapse/issues/19131)) - Speed up pruning of ratelimiters. ([\#19129](https://github.com/element-hq/synapse/issues/19129)) ### Updates to locked dependencies * Bump actions/download-artifact from 5.0.0 to 6.0.0. ([\#19102](https://github.com/element-hq/synapse/issues/19102)) * Bump actions/upload-artifact from 4 to 5. ([\#19106](https://github.com/element-hq/synapse/issues/19106)) * Bump hiredis from 3.2.1 to 3.3.0. ([\#19103](https://github.com/element-hq/synapse/issues/19103)) * Bump icu_segmenter from 2.0.0 to 2.0.1. ([\#19126](https://github.com/element-hq/synapse/issues/19126)) * Bump idna from 3.10 to 3.11. ([\#19053](https://github.com/element-hq/synapse/issues/19053)) * Bump ijson from 3.4.0 to 3.4.0.post0. ([\#19051](https://github.com/element-hq/synapse/issues/19051)) * Bump markdown-it-py from 3.0.0 to 4.0.0. ([\#19123](https://github.com/element-hq/synapse/issues/19123)) * Bump msgpack from 1.1.1 to 1.1.2. ([\#19050](https://github.com/element-hq/synapse/issues/19050)) * Bump psycopg2 from 2.9.10 to 2.9.11. ([\#19125](https://github.com/element-hq/synapse/issues/19125)) * Bump pyyaml from 6.0.2 to 6.0.3. ([\#19105](https://github.com/element-hq/synapse/issues/19105)) * Bump regex from 1.11.3 to 1.12.2. ([\#19074](https://github.com/element-hq/synapse/issues/19074)) * Bump reqwest from 0.12.23 to 0.12.24. ([\#19077](https://github.com/element-hq/synapse/issues/19077)) * Bump ruff from 0.12.10 to 0.14.3. ([\#19124](https://github.com/element-hq/synapse/issues/19124)) * Bump sigstore/cosign-installer from 3.10.0 to 4.0.0. ([\#19075](https://github.com/element-hq/synapse/issues/19075)) * Bump stefanzweifel/git-auto-commit-action from 6.0.1 to 7.0.0. ([\#19052](https://github.com/element-hq/synapse/issues/19052)) * Bump tokio from 1.47.1 to 1.48.0. ([\#19076](https://github.com/element-hq/synapse/issues/19076)) * Bump types-psycopg2 from 2.9.21.20250915 to 2.9.21.20251012. ([\#19054](https://github.com/element-hq/synapse/issues/19054))

# Synapse 1.138.4 (2025-10-07) ## Bugfixes - Fix a bug introduced in 1.138.3 where a client could receive an Internal Server Error if they set `device_keys: null` in the request to [`POST /_matrix/client/v3/keys/upload`](https://spec.matrix.org/v1.16/client-server-api/#post_matrixclientv3keysupload). ([\#19023](https://github.com/element-hq/synapse/issues/19023))

# Synapse 1.139.2 (2025-10-07) ## Bugfixes - Fix a bug introduced in 1.139.1 where a client could receive an Internal Server Error if they set `device_keys: null` in the request to [`POST /_matrix/client/v3/keys/upload`](https://spec.matrix.org/v1.16/client-server-api/#post_matrixclientv3keysupload). ([\#19023](https://github.com/element-hq/synapse/issues/19023))

# Synapse 1.139.0 (2025-09-30) ### `/register` requests from old application service implementations may break when using MAS If you are using Matrix Authentication Service (MAS), as of this release any Application Services that do not set `inhibit_login=true` when calling `POST /_matrix/client/v3/register` will receive the error `IO.ELEMENT.MSC4190.M_APPSERVICE_LOGIN_UNSUPPORTED` in response. Please see [the upgrade notes](https://element-hq.github.io/synapse/develop/upgrade.html#register-requests-from-old-application-service-implementations-may-break-when-using-mas) for more information. No significant changes since 1.139.0rc3. # Synapse 1.139.0rc3 (2025-09-25) ## Bugfixes - Fix a bug introduced in 1.139.0rc1 where `run_coroutine_in_background(...)` incorrectly handled logcontexts, resulting in partially broken logging. ([\#18964](https://github.com/element-hq/synapse/issues/18964)) # Synapse 1.139.0rc2 (2025-09-23) ## Internal Changes - Drop support for Ubuntu 24.10 Oracular Oriole, and add support for Ubuntu 25.04 Plucky Puffin. ([\#18962](https://github.com/element-hq/synapse/issues/18962)) # Synapse 1.139.0rc1 (2025-09-23) ## Features - Add experimental support for [MSC4308: Thread Subscriptions extension to Sliding Sync](https://github.com/matrix-org/matrix-spec-proposals/pull/4308) when [MSC4306: Thread Subscriptions](https://github.com/matrix-org/matrix-spec-proposals/pull/4306) and [MSC4186: Simplified Sliding Sync](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) are enabled. ([\#18695](https://github.com/element-hq/synapse/issues/18695)) - Update push rules for experimental [MSC4306: Thread Subscriptions](https://github.com/matrix-org/matrix-doc/issues/4306) to follow a newer draft. ([\#18846](https://github.com/element-hq/synapse/issues/18846)) - Add `get_media_upload_limits_for_user` and `on_media_upload_limit_exceeded` module API callbacks to the media repository. ([\#18848](https://github.com/element-hq/synapse/issues/18848)) - Support [MSC4169](https://github.com/matrix-org/matrix-spec-proposals/pull/4169) for backwards-compatible redaction sending using the `/send` endpoint. Contributed by @SpiritCroc @ Beeper. ([\#18898](https://github.com/element-hq/synapse/issues/18898)) - Add an in-memory cache to `_get_e2e_cross_signing_signatures_for_devices` to reduce DB load. ([\#18899](https://github.com/element-hq/synapse/issues/18899)) - Update [MSC4190](https://github.com/matrix-org/matrix-spec-proposals/pull/4190) support to return correct errors and allow appservices to reset cross-signing keys without user-interactive authentication. Contributed by @tulir @ Beeper. ([\#18946](https://github.com/element-hq/synapse/issues/18946)) ## Bugfixes - Ensure all PDUs sent via `/send` pass canonical JSON checks. ([\#18641](https://github.com/element-hq/synapse/issues/18641)) - Fix bug where we did not send invite revocations over federation. ([\#18823](https://github.com/element-hq/synapse/issues/18823)) - Fix prefixed support for [MSC4133](https://github.com/matrix-org/matrix-spec-proposals/pull/4133). ([\#18875](https://github.com/element-hq/synapse/issues/18875)) - Fix open redirect in legacy SSO flow with the `idp` query parameter. ([\#18909](https://github.com/element-hq/synapse/issues/18909)) - Fix a performance regression related to the experimental Delayed Events ([MSC4140](https://github.com/matrix-org/matrix-spec-proposals/pull/4140)) feature. ([\#18926](https://github.com/element-hq/synapse/issues/18926)) ## Updates to the Docker image - Suppress "Applying schema" log noise bulk when `SYNAPSE_LOG_TESTING` is set. ([\#18878](https://github.com/element-hq/synapse/issues/18878)) ## Improved Documentation - Clarify Python dependency constraints in our deprecation policy. ([\#18856](https://github.com/element-hq/synapse/issues/18856)) - Clarify necessary `jwt_config` parameter in OIDC documentation for authentik. Contributed by @maxkratz. ([\#18931](https://github.com/element-hq/synapse/issues/18931)) ## Deprecations and Removals - Remove obsolete and experimental `/sync/e2ee` endpoint. ([\#18583](https://github.com/element-hq/synapse/issues/18583)) ## Internal Changes - Fix `LaterGauge` metrics to collect from all servers. ([\#18791](https://github.com/element-hq/synapse/issues/18791)) - Configure Synapse to run [MSC4306: Thread Subscriptions](https://github.com/matrix-org/matrix-spec-proposals/pull/4306) Complement tests. ([\#18819](https://github.com/element-hq/synapse/issues/18819)) - Remove `sentinel` logcontext usage where we log in `setup`, `start` and `exit`. ([\#18870](https://github.com/element-hq/synapse/issues/18870)) - Use the `Enum`'s value for the dictionary key when responding to an admin request for experimental features. ([\#18874](https://github.com/element-hq/synapse/issues/18874)) - Start background tasks after we fork the process (daemonize). ([\#18886](https://github.com/element-hq/synapse/issues/18886)) - Better explain how we manage the logcontext in `run_in_background(...)` and `run_as_background_process(...)`. ([\#18900](https://github.com/element-hq/synapse/issues/18900), [\#18906](https://github.com/element-hq/synapse/issues/18906)) - Remove `sentinel` logcontext usage in `Clock` utilities like `looping_call` and `call_later`. ([\#18907](https://github.com/element-hq/synapse/issues/18907)) - Replace usages of the deprecated `pkg_resources` interface in preparation of setuptools dropping it soon. ([\#18910](https://github.com/element-hq/synapse/issues/18910)) - Split loading config from homeserver `setup`. ([\#18933](https://github.com/element-hq/synapse/issues/18933)) - Fix `run_in_background` not being awaited properly in some tests causing `LoggingContext` problems. ([\#18937](https://github.com/element-hq/synapse/issues/18937)) - Fix `run_as_background_process` not being awaited properly causing `LoggingContext` problems in experimental [MSC4140](https://github.com/matrix-org/matrix-spec-proposals/pull/4140): Delayed events implementation. ([\#18938](https://github.com/element-hq/synapse/issues/18938)) - Introduce `Clock.call_when_running(...)` to wrap startup code in a logcontext, ensuring we can identify which server generated the logs. ([\#18944](https://github.com/element-hq/synapse/issues/18944)) - Introduce `Clock.add_system_event_trigger(...)` to wrap system event callback code in a logcontext, ensuring we can identify which server generated the logs. ([\#18945](https://github.com/element-hq/synapse/issues/18945)) ### Updates to locked dependencies * Bump actions/setup-go from 5.5.0 to 6.0.0. ([\#18891](https://github.com/element-hq/synapse/issues/18891)) * Bump actions/setup-python from 5.6.0 to 6.0.0. ([\#18890](https://github.com/element-hq/synapse/issues/18890)) * Bump authlib from 1.6.1 to 1.6.3. ([\#18921](https://github.com/element-hq/synapse/issues/18921)) * Bump jsonschema from 4.25.0 to 4.25.1. ([\#18897](https://github.com/element-hq/synapse/issues/18897)) * Bump log from 0.4.27 to 0.4.28. ([\#18892](https://github.com/element-hq/synapse/issues/18892)) * Bump phonenumbers from 9.0.12 to 9.0.13. ([\#18893](https://github.com/element-hq/synapse/issues/18893)) * Bump pydantic from 2.11.7 to 2.11.9. ([\#18922](https://github.com/element-hq/synapse/issues/18922)) * Bump serde from 1.0.219 to 1.0.223. ([\#18920](https://github.com/element-hq/synapse/issues/18920)) * Bump serde_json from 1.0.143 to 1.0.145. ([\#18919](https://github.com/element-hq/synapse/issues/18919)) * Bump sigstore/cosign-installer from 3.9.2 to 3.10.0. ([\#18917](https://github.com/element-hq/synapse/issues/18917)) * Bump towncrier from 24.8.0 to 25.8.0. ([\#18894](https://github.com/element-hq/synapse/issues/18894)) * Bump types-psycopg2 from 2.9.21.20250809 to 2.9.21.20250915. ([\#18918](https://github.com/element-hq/synapse/issues/18918)) * Bump types-requests from 2.32.4.20250611 to 2.32.4.20250809. ([\#18895](https://github.com/element-hq/synapse/issues/18895)) * Bump types-setuptools from 80.9.0.20250809 to 80.9.0.20250822. ([\#18924](https://github.com/element-hq/synapse/issues/18924))