CVE-2026-6961

7.6 Élevée

Publiée le 12/06/2026 à 19:16 · Modifiée le 18/06/2026 à 16:40 · 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 Mattermost fails to sanitize FileInfo.Name received from federated peers during shared channel file sync, which allows an attacker who controls a federated server to write files to arbitrary locations within the target server's filestore via path traversal sequences in the filename field.. Mattermost Advisory ID: MMSA-2026-00661

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Produits concernés

Mattermost
Mattermost mattermost server

Scores CVSS

Version	Score	Source	Vecteur
3.1	7.6 Élevée	responsibledisclosure@mattermost.com	`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L`

Faiblesses (CWE)

CWE-22

Références

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

Ailleurs

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