What is GHSA-523x-7gmh-rhpc?

GHSA-523x-7gmh-rhpc 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 validate...

Which CVE IDs does GHSA-523x-7gmh-rhpc cover?

GHSA-523x-7gmh-rhpc covers the following CVE IDs: CVE-2026-10080. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-523x-7gmh-rhpc?

GHSA-523x-7gmh-rhpc has a CVSS v3 base score of 6.5, published by GitHub Security Advisories.

GHSA-523x-7gmh-rhpcMediumCVSS 6.5

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

Vendor

GitHub Security Advisories

Published

August 18, 2026

Last Modified

August 18, 2026

🔗 CVE IDs covered (1)

CVE-2026-10080 →

📋 Description

Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21, 11.8.x <= 11.8.3 fails to validate WebSocket command field types which allows an authenticated user to crash the plugin process and deny service to all Boards users via a custom_focalboard_SUBSCRIBE_TEAM message with a non-string teamId.. Mattermost Advisory ID: MMSA-2026-00687

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-10080
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-523x-7gmh-rhpc