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CVE-2026-23962

HIGH

7.5

Description

Mastodon is a free, open-source social network server based on ActivityPub. Mastodon versions before v4.3.18, v4.4.12, and v4.5.5 do not have a limit on the maximum number of poll options for remote posts, allowing attackers to create polls with a very large amount of options, greatly increasing resource consumption. Depending on the number of poll options, an attacker can cause disproportionate resource usage in both Mastodon servers and clients, potentially causing Denial of Service either server-side or client-side. Mastodon versions v4.5.5, v4.4.12, v4.3.18 are patched.

Details CVE

Score CVSS v3.17.5

SeveriteHIGH

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie1/22/2026

Derniere modification2/2/2026

Sourcenvd

Observations honeypot0

Produits affectes

joinmastodon:mastodon

Faiblesses (CWE)

CWE-770

References

https://github.com/mastodon/mastodon/releases/tag/v4.3.18(security-advisories@github.com)

https://github.com/mastodon/mastodon/releases/tag/v4.4.12(security-advisories@github.com)

https://github.com/mastodon/mastodon/releases/tag/v4.5.5(security-advisories@github.com)

https://github.com/mastodon/mastodon/security/advisories/GHSA-gg8q-rcg7-p79g(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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