What is GHSA-q4vh-9cg5-4q62?

GHSA-q4vh-9cg5-4q62 is a security advisory published by GitHub Security Advisories with Low severity. Mattermost Desktop App versions \u003c=6.2 6.2.2.0 fails to validate the IPC sender in the leaveCall...

Which CVE IDs does GHSA-q4vh-9cg5-4q62 cover?

GHSA-q4vh-9cg5-4q62 covers the following CVE IDs: CVE-2026-12284. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-q4vh-9cg5-4q62?

GHSA-q4vh-9cg5-4q62 has a CVSS v3 base score of 3.7, published by GitHub Security Advisories.

GHSA-q4vh-9cg5-4q62LowCVSS 3.7

Mattermost Desktop App versions <=6.2 6.2.2.0 fails to validate the IPC sender in the leaveCall...

Vendor

GitHub Security Advisories

Published

September 17, 2026

Last Modified

September 17, 2026

🔗 CVE IDs covered (1)

CVE-2026-12284 →

📋 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. Mattermost Advisory ID: MMSA-2026-00699

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-12284
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-q4vh-9cg5-4q62