CVE-2026-3433

4.3 Moyenne

Publiée le 12/06/2026 à 19:16 · Modifiée le 18/06/2026 à 16:31 · Analysée par le NVD · Source : responsibledisclosure@mattermost.com

Description

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to restrict role_updated websocket event broadcasts to members of the affected team or channel which allows an authenticated attacker with guest-level access to observe permission scheme change notifications for private teams they are not a member of via the websocket connection.. Mattermost Advisory ID: MMSA-2026-00616

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Produits concernés

Mattermost
Mattermost mattermost server

Scores CVSS

Version	Score	Source	Vecteur
3.1	4.3 Moyenne	responsibledisclosure@mattermost.com	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N`

Faiblesses (CWE)

CWE-200

Références

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

Ailleurs

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