We just released Mastodon 4.3.3, 4.2.15 and 4.1.22. They contain a few bug fixes as well as a security fix (medium severity, 
)
We recommend every instance administrator to update as soon as possible.
If you are using our nightly releases, a container image with the fix has been published with the `nightly.2025-01-17-security` tag.
Full release notes and update instructions are available on our GitHub release page: 
#mastoadmin
GitHub
Partial Denial of Service due to insufficient validation of remote actors
### Summary
Insufficient validation of remote actors and error handling, invalid actors can cause a Mastodon servers to fail at performing certa...
GitHub
Releases ยท mastodon/mastodon
Your self-hosted, globally interconnected microblogging community - mastodon/mastodon