Fiche vulnérabilité
CVE-2026-23963 : faille moyenne joinmastodon mastodon (CVSS 6.5)
Description
Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 4.5.5, 4.4.12, and 4.3.18, the server does not enforce a maximum length for the names of lists or filters, or for filter keywords, allowing any user to set an arbitrarily long string as the name or keyword. Any local user can abuse the list or filter fields to cause disproportionate storage and computing resource usage. They can additionally cause their own web interface to be unusable, although they must intentionally do this to themselves or unknowingly approve a malicious API client. Mastodon versions v4.5.5, v4.4.12, v4.3.18 are patched.
En bref
- Sévérité
- Moyenne (CVSS 6.5)
- Vecteur CVSS
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Exploitation active
- Non signalée par la CISA
- Publication
- 22 janv. 2026
- Dernière mise à jour
- 17 juin 2026
Produits concernés
- joinmastodon mastodon