Changelog

Security

• Update dependencies
• Fix private mention filtering (GHSA-5fq7-3p3j-9vrf)
• Fix password change endpoint not being rate-limited (GHSA-q3rg-xx5v-4mxh)
• Add hardening around rate-limit bypass (GHSA-c2r5-cfqr-c553)

Added

• Add rate-limit on OAuth application registration (ThisIsMissEm)
• Add fallback redirection when getting a webfinger query WEB_DOMAIN@WEB_DOMAIN (ClearlyClaire)
• Add digest attribute to Admin::DomainBlock entity in REST API (ThisIsMissEm)

Removed

• Remove superfluous application-level caching in some controllers (ClearlyClaire)
• Remove aggressive OAuth application vacuuming (ThisIsMissEm)

Fixed

• Fix leaking Elasticsearch connections in Sidekiq processes (ClearlyClaire)
• Fix language of remote posts not being recognized when using unusual casing (ClearlyClaire)
• Fix off-by-one in tootctl media commands (ClearlyClaire)
• Fix removal of allowed domains (in LIMITED_FEDERATION_MODE) not being recorded in the audit log (ThisIsMissEm)
• Fix not being able to block a subdomain of an already-blocked domain through the API (ClearlyClaire)
• Fix Idempotency-Key being ignored when scheduling a post (ClearlyClaire)
• Fix crash when supplying the FFMPEG_BINARY environment variable (timothyjrogers)
• Fix improper email address validation (ClearlyClaire)
• Fix results/query in api/v1/featured_tags/suggestions (mjankowski)
• Fix unblocking internationalized domain names under certain conditions (tribela)
• Fix admin account created by mastodon:setup not being auto-approved (ClearlyClaire)
• Fix reference to non-existent var in CLI maintenance command (mjankowski)

Upgrade notes

To get the code for v4.2.9, use git fetch && git checkout v4.2.9.

[!NOTE] As always, make sure you have backups of the database before performing any upgrades. If you are using docker-compose, this is how a backup command might look: docker exec mastodon_db_1 pg_dump -Fc -U postgres postgres > name_of_the_backup.dump

[!IMPORTANT] Mastodon is now performing stricter checks to prevent client IP address spoofing. This means that if one of your reverse proxy is not on Mastodon's local network, you will need to set TRUSTED_PROXY_IP accordingly, listing the IP address of every trusted reverse-proxy (including local network ones). See the documentation for more information.

Dependencies

With the exception of Ruby's recommended version, external dependencies have not changed since v4.2.0, the compatible Ruby, PostgreSQL, Node, Elasticsearch and Redis versions are the same, that is:

• Ruby: 3.0 to 3.2
• PostgreSQL: 10 or newer
• Elasticsearch (recommended, for full-text search): 7.x (OpenSearch should also work)
• LibreTranslate (optional, for translations): 1.3.3 or newer
• Redis: 4 or newer
• Node: 16 or newer
• ImageMagick: 6.9.7-7 or newer

Update steps

The following instructions are for updating from 4.2.8.

If you are upgrading directly from an earlier release, please carefully read the upgrade notes for the skipped releases as well, as they often require extra steps such as database migrations.

Non-Docker only:

1. Install dependencies: bundle install and yarn install --frozen-lockfile
2. Restart all Mastodon processes

Using Docker:

1. Restart all Mastodon processes