CVE-2026-28741 MEDIUM

CVE-2026-28741: CSRF Protection Bypass Allows Updating a User's Authentication Method

Vendor Mattermost
Product Mattermost
Weakness CWE-352 · CSRF
Published April 15, 2026
Last update April 15, 2026
View on NVD All CVEs

CVSS base score

6.8/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

April 15, 2026 CVE published
April 15, 2026 Record updated