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GHSA-J5VQ-62GR-8V3R Mattermost fails to check Websocket request for proper UTF-8 format potentially crashing Calls plug-in

🗓️ 17 Dec 2025 21:30:48Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 5 Views

Mattermost Calls plugin crash due to improper UTF-8 validation in WebSocket requests across several versions.

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30 Dec 2025 02:26Current
6.8Medium risk
Vulners AI Score6.8
CVSS 3.16.5
EPSS0.00279
5