mastodon/SECURITY.md

Security Policy

If you believe you've identified a security vulnerability in Mastodon (a bug that allows something to happen that shouldn't be possible), you can either:

• open a GitHub security issue on the Mastodon project
• reach us at security@joinmastodon.org

You should not report such issues on public GitHub issues or in other public spaces to give us time to publish a fix for the issue without exposing Mastodon's users to increased risk.

Scope

A "vulnerability in Mastodon" is a vulnerability in the code distributed through our main source code repository on GitHub. Vulnerabilities that are specific to a given installation (e.g. misconfiguration) should be reported to the owner of that installation and not us.

Supported Versions

Version	Supported
4.3.x	Yes
4.2.x	Yes
4.1.x	Until 2025-04-08
< 4.1	No