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.
Metrics
Affected Vendors & Products
References
History
Sat, 28 Mar 2026 03:15:00 +0000
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ssvc
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Fri, 27 Mar 2026 20:15:00 +0000
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| 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. | |
| Title | Mastodon has a denial of service for quote authorization | |
| Weaknesses | CWE-863 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-03-27T20:29:18.521Z
Reserved: 2026-03-24T15:10:05.678Z
Link: CVE-2026-33869
Updated: 2026-03-27T20:29:14.109Z
Status : Received
Published: 2026-03-27T20:16:34.500
Modified: 2026-03-27T20:16:34.500
Link: CVE-2026-33869
No data.
OpenCVE Enrichment
No data.