CVE-2026-12284

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...

PT-2026-94361

Name of the Vulnerable Software and Affected Versions Mattermost Desktop App versions prior to 6.2.2.0 Description The application fails to validate the Inter-Process Communication IPC sender within the leaveCall handler. This allows a compromised Mattermost server or a user with script access to...

CVE-2026-12284: Origin Validation Error

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...