What is GHSA-ghq9-4rcg-jvc2?

GHSA-ghq9-4rcg-jvc2 is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost versions 11.7.x \u003c= 11.7.6, 10.11.x \u003c= 10.11.21, 11.8.x \u003c= 11.8.3 fails to reconcile...

Which CVE IDs does GHSA-ghq9-4rcg-jvc2 cover?

GHSA-ghq9-4rcg-jvc2 covers the following CVE IDs: CVE-2026-10527. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-ghq9-4rcg-jvc2?

GHSA-ghq9-4rcg-jvc2 has a CVSS v3 base score of 6.3, published by GitHub Security Advisories.

GHSA-ghq9-4rcg-jvc2MediumCVSS 6.3

Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21, 11.8.x <= 11.8.3 fails to reconcile...

Vendor

GitHub Security Advisories

Published

August 17, 2026

Last Modified

August 17, 2026

🔗 CVE IDs covered (1)

CVE-2026-10527 →

📋 Description

Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21, 11.8.x <= 11.8.3 fails to reconcile SchemeAdmin flags with a user's current role which allows a user demoted to System Guest to retain Board Admin privileges and perform admin-only operations via the Boards REST API or UI.. Mattermost Advisory ID: MMSA-2026-00691

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-10527
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-ghq9-4rcg-jvc2