CVE-2026-20796

LOW

3.1

Description

Mattermost versions 10.11.x <= 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /common_teams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549

Details CVE

Score CVSS v3.13.1

SeveriteLOW

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

Vecteur d'attaqueNETWORK

ComplexiteHIGH

Privileges requisLOW

Interaction utilisateurNONE

Publie2/13/2026

Derniere modification2/23/2026

Sourcenvd

Observations honeypot0

Produits affectes

mattermost:mattermost_server

Faiblesses (CWE)

CWE-367

References

https://mattermost.com/security-updates(responsibledisclosure@mattermost.com)

Correlations IOC

Aucune correlation enregistree

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