What is GHSA-jp3f-x449-4q75?

GHSA-jp3f-x449-4q75 is a security advisory published by GitHub Security Advisories with Low severity. Mattermost versions 11.5.x \u003c= 11.5.1, 10.11.x \u003c= 10.11.13 fail to enforce client identity binding...

Which CVE IDs does GHSA-jp3f-x449-4q75 cover?

GHSA-jp3f-x449-4q75 covers the following CVE IDs: CVE-2026-6334. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-jp3f-x449-4q75?

GHSA-jp3f-x449-4q75 has a CVSS v3 base score of 3.1, published by GitHub Security Advisories.

GHSA-jp3f-x449-4q75LowCVSS 3.1

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to enforce client identity binding...

Vendor

GitHub Security Advisories

Published

May 18, 2026

Last Modified

May 18, 2026

🔗 CVE IDs covered (1)

CVE-2026-6334 →

📋 Description

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to enforce client identity binding during the OAuth authorization code redemption flow which allows an authenticated OAuth client to redeem authorization codes issued to a different client via a crafted token exchange request.. Mattermost Advisory ID: MMSA-2026-00570

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-6334
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-jp3f-x449-4q75