The first beta version for Mastodon 5.0 is now available!

After testing it on mastodon.social for a few weeks, we believe that this version is stable enough to be deployed by others, so if you like testing our new things feel free to install this beta version and report any bugs your find on GitHub or our community forum (https://community.joinmastodon.org/)

We expect the final release to happen within the next 2-3 weeks.

Release notes and upgrade instructions here: https://github.com/mastodon/mastodon/releases/tag/v5.0.0-beta.1

#mastoadmin

We just released Mastodon v4.7.5, v4.6.11, v4.5.21 and v4.4.28.

They fix multiple high severity security issues. We encourage admins to update as soon as they can.

Full release notes and update instructions are available on the GitHub releases page.

https://github.com/mastodon/mastodon/releases

#MastoAdmin

We just released Mastodon v4.7.4, v4.6.10, v4.5.20 and v4.4.27.

For those using our nightly containers, the `nightly.2026-10-30-security ` tag is available with the fix.

In addition to several bugfixes and dependency updates, they fix a critical security issue that can be used to impersonate remote accounts and activities. We urge admins to update as soon as possible.

Full release notes and update instructions are available on the GitHub releases page.

https://github.com/mastodon/mastodon/releases

#MastoAdmin

📬 Trunk & Tidbits for September 2026 is now out!

Our monthly blog post series is there to showcase what we worked on last month.

A lot happened last month in preparation of our upcoming Mastodon 5.0 release. We also merged an optimisation to account deletion federation (which requires signed fetches for accounts), a few improvements to the moderation panel and to our FASP integration.

https://blog.joinmastodon.org/2026/10/trunk-tidbits-september-2026/

#mastodev #mastoadmin #TrunkAndTidbits

We are planning to release new Mastodon security updates for versions 4.4, 4.5, 4.6, 4.7 and nightly this Thursday, Oct 29, at around 14:00 UTC.

It solves a critical severity security issue.

We encourage server administrators to plan for an update in the hours following the release to ensure their instance is protected. These versions will not require database migrations.

#MastoAdmin

In the wake of the compromise of the eMudhra Intermediate CA, we strongly encourage all Mastodon administrators to make sure their systems are up-to-date.

For those using our official Mastodon container images, we just rebuilt them (with the same tags) so they contain the latest updates to the list of CA certificates. Please update them as soon as possible.

For more information about this compromise and ways to check if your server is impacted, please read https://emudhra.we-have-a-problem.com

#mastoadmin

We just released Mastodon v4.7.3, v4.6.9, v4.5.19 and v4.4.26.

They contain many bugfixes in addition to updating some of our dependencies to fix security issues in those.

We recommend administrators to update when they can.

Full release notes and update instructions are available on the GitHub releases page.

https://github.com/mastodon/mastodon/releases

#mastoadmin

We are aware of an ongoing wave of subscription spam throughout the fediverse.

We are investigating avenues to mitigate this, but they will likely involve deep changes in the sign-up flow that may break sign-up from existing applications.

In the meantime, you can find helpful resources at https://about.iftas.org/2026/09/11/boom-protocol-spam/

#MastoAdmin

Poll for Mastodon administrators *who are not using containers/Docker* : how are you installing Ruby?

If other, please reply to explain how you do it, and why.

For context, we are looking at reducing the number of Ruby versions supported by Mastodon to reduce our maintenance burden (like supporting only Ruby 4.0 in the next version) and want to better understand the impact of such a decision.

#mastoadmin

We just released Mastodon v4.7.2, v4.6.8, v4.5.18 and v4.4.25.

In addition to several bugfixes, they disable HEIF processing to avoid a known critical security issues. We encourage server administrators to update as soon as possible.

Full release notes and update instructions are available on the GitHub releases page.

https://github.com/mastodon/mastodon/releases

#MastoAdmin

We just released Mastodon v4.7.1, v4.6.7, v4.5.17 and v4.4.24.

These include important security fixes.

We encourage server administrators to update as soon as possible, especially if you are using LDAP, PAM or an external SSO for user authentication.

Full release notes and update instructions are available on the GitHub releases page.

https://github.com/mastodon/mastodon/releases

#MastoAdmin

We just released Mastodon 4.7.0!

This version contains very few user-facing changes, but significantly reworks the backend code to improve security and support new protocol features.

You can read more about it on our blog: https://blog.joinmastodon.org/2026/08/mastodon-4.7/

Note for admins: the database migrations might take a long time, this is expected (see the release notes).

Release notes and upgrade instructions are available here: https://github.com/mastodon/mastodon/releases/tag/v4.7.0

#mastoadmin

After publishing the results of Discovery Week, we can now give you a first sneak peak at Mastodon 5.0, our next big version. It will bring a new visual look to your screens, a refreshed and calmer layout, as well as a new composer.

https://blog.joinmastodon.org/2026/08/5.0-laying-the-foundation/

#mastodon #mastodon5.0

We released the Release Candidate for Mastodon 4.7 today.

It contains very few user-facing changes, but significantly reworks the backend code to improve security and support new protocol features.

We plan to release the final 4.7 version next week, so if you like being on the edge please test this RC and send us your feedback!

The database migrations might take a long time, this is expected.

Release notes and upgrade instructions are available here: https://github.com/mastodon/mastodon/releases/tag/v4.7.0-rc.1

#mastoadmin

We just released Mastodon 4.6.6, 4.5.16 and 4.4.23.

They contain minor bug fixes and we advise server administrators to update when they can.

Full release notes and update instructions are available on the GitHub releases page. https://github.com/mastodon/mastodon/releases

#mastoadmin

📬 Trunk & Tidbits for July 2026 is now out!

Our monthly blog post series is there to showcase what we worked on last month.

In this edition, we welcome @jhbabon and highlight the many backend changes that were merged and will be part of our upcoming 4.7 release. Those include support for FEP-8b32, FEP 8967 and new algorithms, including ML-DSA-44 for post-quantum signatures.

https://blog.joinmastodon.org/2026/08/trunk-tidbits-july-2026/

#mastodev #mastoadmin #TrunkAndTidbits

We released the first beta for Mastodon 4.7 today. It contains very few user-facing changes, but contains significant reworks of the backend code to improve security and support new protocol features.

This update includes substantial database migrations that might take up to a couple of hours on very large servers, but will not cause downtime if the upgrade instructions are followed.

Release notes and upgrade instructions are available here: https://github.com/mastodon/mastodon/releases/tag/v4.7.0-beta.1

#mastoadmin

We just released Mastodon 4.6.5. It contains one important bug fix and we recommend every instance running 4.6 to update.

We are also releasing Mastodon v4.5.15 and v4.4.22 with minor bugfixes

Full release notes and update instructions are available on the GitHub releases page.

https://github.com/mastodon/mastodon/releases

#mastoadmin

We just released Mastodon 4.6.4, 4.5.14 and 4.4.21.

Those updates include multiple security fixes, including fixes for two major issues.

We encourage server administrators to update as soon as possible, as one of the issues can expose PII of local users. We are investigating potential uses of this exploit and will soon share more information.

Full release notes and update instructions are available on the GitHub release page.

https://github.com/mastodon/mastodon/releases/v4.6.4

#MastoAdmin

We are planning to release new Mastodon security updates for versions 4.4, 4.5, 4.6 and nightly this Monday, Jul 27, at around 14:00 UTC.

It solves two major security issues.

We encourage server administrators to plan for an update in the hours following the release to ensure their instance is protected. These versions will not require database migrations.

#mastoadmin