CVE-2026-22545: Mattermost Server

Low severity, CVSS 3.5. EPSS: 0.1% chance of exploitation in the next 30 days.

Mattermost versions 10.11.x <= 10.11.10 fail to validate user's authentication method when processing account auth type switch which allows an authenticated attacker to change account password without confirmation via falsely claiming a different auth provider.. Mattermost Advisory ID: MMSA-2026-00583

Affected products

• Mattermost Mattermost Server: from 10.11.0, before 10.11.11 (fixed in 10.11.11)

Published 2026-03-16. Last modified 2026-06-17.