CVE-2026-28741 — CSRF Protection Bypass Allows Updating a User's Authentication Method
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…
Published: 2026-04-15 · CVSS: 6.8 · CVSS 3.1
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
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7