CVE-2026-9162
Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to invalidate cached authentication state for active WebSocket connections during global session revocation, which allows a user with an existing WebSocket connection to remain authenticated and continue receiving real-time events until the cached session expires or the client reconnects.. Mattermost Advisory ID: MMSA-2026-00664
- Score
- CVSS 3.1 4.3 Medium
- Status
- Analyzed - responsibledisclosure@mattermost.com
- Published
- 2026-06-22
- Last modified
- 2026-06-22
- Weaknesses
- CWE-613
Affected products
References
- https://mattermost.com/security-updates
