Mastodon is a free, open-source social network server based on ActivityPub. In versions before 4.4.6, 4.3.14, and 4.2.27, disabling or suspending a user account does not disconnect the account from the streaming API. This allows disabled or suspended accounts to continue receiving real-time updates through existing streaming connections and to establish new streaming connections, even though they cannot interact with other API endpoints. This undermines moderation actions, as administrators expect disabled or suspended accounts to be fully disconnected from the service. This issue has been patched in versions 4.4.6, 4.3.14, and 4.2.27. No known workarounds exist.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/mastodon/mastodon/commit/2971ac9863b91372e68ac152caf6f4dbff511d17 Patch
- https://github.com/mastodon/mastodon/security/advisories/GHSA-r2fh-jr9c-9pxh Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 4.3 · joinmastodonNVD modified 2026-10-19 16:10
Affected (CPE criteria) 1
cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*