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CVE-2026-3433 Mattermost fails to scope role_updated websocket events to authorized team and channel members

🗓️ 12 Jun 2026 15:46:54Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 1 Views

Mattermost fails to scope role_updated websocket events to authorized members, exposing private team permission changes to guest users.

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15 Jul 2026 01:48Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.14.3
EPSS0.0018
1