PT-2026-94361

CVE-2026-12284

Published

2026-09-17

Updated

2026-10-13

Description by

CVSS 3.1

3.7

Low

MetricsAV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

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 a connected server view to disconnect an active call associated with a different connected server by sending a desktopAPI.leaveCall IPC message.

Recommendations Update Mattermost Desktop App to version 6.2.2.0 or later.

Exploitability

Exploit

Fix

Impacts

Researchers

Juho Forsén

Vendors

Affected products

Weakness enumeration

CWE-346: Origin Validation Error

Related identifiers