PT-2026-51322 · Mattermost · Mattermost
Winfunc
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Published
2026-06-22
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Updated
2026-06-22
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CVE-2026-9162
CVSS v3.1
4.3
Medium
| Vector | AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
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
Fix
Insufficient Session Expiration
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Weakness Enumeration
Related Identifiers
Affected Products
Mattermost