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CVE-2026-28741

MEDIUM CVSS: 6.8 Published: 2026-04-15 Modified: 2026-06-17

Description

Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to validate CSRF tokens on an authentication endpoint which allows an attacker to update a user's authentication method via a CSRF attack by tricking a user into visiting a malicious page. Mattermost Advisory ID: MMSA-2026-00625

Affected Platforms

Mattermost Mattermost Server

Weakness Type

CWE-352

References