{"schemaVersion":3,"id":"CVE-2026-12284","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Mattermost Desktop App versions <=6.2 6.2.2.0 fails to validate the IPC sender in the leaveCall handler which allows a malicious or compromised Mattermost server (or a user with script access to a connected server view) to disconnect an active call belonging to a different connected server via the desktopAPI.leaveCall IPC message. 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