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CVE-2026-9162

Global session revocation does not invalidate active WebSocket connections PUBLISHED

Description (CNA)

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

Affected (CNA)

Vendor / productVersions
Mattermost / Mattermostaffected 11.7.0 through 11.7.0; affected 11.6.0 through 11.6.2; affected 11.5.0 through 11.5.5; affected 10.11.0 through 10.11.17; unaffected 11.8.0; unaffected 11.7.1; unaffected 11.6.3; unaffected 11.5.6; unaffected 10.11.18

CWE

CWE-613

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.