CVE-2026-6062

6.4 Moyenne

Publiée le 22/06/2026 à 16:17 · Modifiée le 23/06/2026 à 22:50 · Analysée par le NVD · Source : responsibledisclosure@mattermost.com

Description

Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 Fail to validate channel ownership of an existing subscription before applying edits which allows an authenticated attacker to hijack subscriptions from channels they have no access to via a crafted PUT request to the subscription edit endpoint.. Mattermost Advisory ID: MMSA-2026-00650

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Produits concernés

Mattermost
Mattermost mattermost server

Scores CVSS

Version	Score	Source	Vecteur
3.1	6.4 Moyenne	responsibledisclosure@mattermost.com	`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L`

Faiblesses (CWE)

CWE-639

Références

https://mattermost.com/security-updates Vendor Advisory

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories