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CVE-2026-5740

🗓️ 05 Jun 2026 19:19:41Reported by redhat.comType 
redhatcve
 redhatcve
🔗 access.redhat.com👁 2 Views

Mattermost fails to validate msgpack WebSocket frames enabling unauthenticated crash and outage.

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05 Jun 2026 19:19Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.17.5
EPSS0.00106
SSVC
2