What is GHSA-2wmq-3m94-g4jr?

GHSA-2wmq-3m94-g4jr is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost Desktop App versions \u003c=6.1 5.5.13.0 fail to restrict the allow list of domains to...

Which CVE IDs does GHSA-2wmq-3m94-g4jr cover?

GHSA-2wmq-3m94-g4jr covers the following CVE IDs: CVE-2026-6517. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-2wmq-3m94-g4jr?

GHSA-2wmq-3m94-g4jr has a CVSS v3 base score of 6.3, published by GitHub Security Advisories.

GHSA-2wmq-3m94-g4jrMediumCVSS 6.3

Mattermost Desktop App versions <=6.1 5.5.13.0 fail to restrict the allow list of domains to...

Vendor

GitHub Security Advisories

Published

June 15, 2026

Last Modified

June 15, 2026

🔗 CVE IDs covered (1)

CVE-2026-6517 →

📋 Description

Mattermost Desktop App versions <=6.1 5.5.13.0 fail to restrict the allow list of domains to which NTLM credentials were forwarded to in the Mattermost Desktop App which allows any user on a server without the image proxy enabled to intercept other users credentials via embedding an image that routes to an external web server. Mattermost Advisory ID: MMSA-2026-00651

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-6517
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-2wmq-3m94-g4jr