Description

Mastodon is a free, open-source social network server based on ActivityPub. In versions on the 4.5.x branch prior to 4.5.8 and on the 4.4.x branch prior to 4.4.15, an attacker that knows of a quote before it has reached a server can prevent it from being correctly processed on that server. The vulnerability has been patched in Mastodon 4.5.8 and 4.4.15. Mastodon 4.3 and earlier are not affected because they do not support quotes.

INFO

Published Date :

2026-03-27T19:52:21.166Z

Last Modified :

2026-03-27T20:29:18.521Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-33869 vulnerability.

No data.

REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-33869.

URL Resource
https://github.com/mastodon/mastodon/security/advisories/GHSA-q4g8-82c5-9h33 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact