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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 |