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CVE-2026-12985

9.3 Critique

Publiée le 14/09/2026 à 17:17 · Modifiée le 07/10/2026 à 19:58 · Analysée par le NVD · Source : responsibledisclosure@mattermost.com

Description

Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7 Mattermost failed to validate Dynamic Client Registration redirect URIs by URL component (matching glob patterns against the raw URI string instead) which allows a remote unauthenticated attacker to register an OAuth client with an attacker-controlled callback host that bypasses the configured redirect URI allowlist via a crafted redirect URI that places an allowlisted host/path suffix inside the query string.. Mattermost Advisory ID: MMSA-2026-00700

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Produits concernés

Scores CVSS

VersionScoreSourceVecteur
3.1 6.8 Moyenne responsibledisclosure@mattermost.com CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
3.1 9.3 Critique nvd@nist.gov (NVD) CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Faiblesses (CWE)

Références

Ailleurs