This is a backport for the 3.4.x branch.

Changelog

Security

• Fix concurrent unfollowing decrementing follower count more than once (Gargron)
• Fix being able to report otherwise inaccessible statuses (Gargron)
• Fix suspended users being able to access APIs that don't require a user (Gargron)
• Fix empty votes arbitrarily increasing voters count in polls (Gargron)
• Fix confirmation redirect to app without Location header (Gargron)

Upgrade notes

Because this is a backport, it is not available with git pull. Use git fetch && git checkout v3.4.8

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

Dependencies

External dependencies have not changed compared to v3.4.7, the compatible Ruby, PostgreSQL, Node, Elasticsearch and Redis versions are the same, that is:

• Ruby: 2.6 to 3.1
• PostgreSQL: 9.5 or newer
• Elasticsearch (optional, for full-text search): 5.x, 6.x or 7.x
• Redis: 4 or newer
• Node: 12 or higher

Update steps

The following instructions are for updating from 3.4.7.

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 or dependency updates.

Non-Docker

1. Pull the code: git fetch && git checkout v3.4.8
2. Restart mastodon-web and mastodon-sidekiq: systemctl reload mastodon-web systemctl restart mastodon-sidekiq

Docker

The exact steps depend on your setup, but they are likely to match the following:

1. Pull the code: git fetch && git checkout v3.4.8
2. Pull the prebuilt images: docker-compose pull, or, alternatively, build them yourself: docker-compose build --pull
3. Restart all Mastodon processes: docker-compose up -d