What is GHSA-vvv9-9jm4-76jg?

GHSA-vvv9-9jm4-76jg is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost versions 11.7.x \u003c= 11.7.2, 11.6.x \u003c= 11.6.4, 10.11.x \u003c= 10.11.19 fail to verify that...

Which CVE IDs does GHSA-vvv9-9jm4-76jg cover?

GHSA-vvv9-9jm4-76jg covers the following CVE IDs: CVE-2026-10106. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-vvv9-9jm4-76jg?

GHSA-vvv9-9jm4-76jg has a CVSS v3 base score of 6.5, published by GitHub Security Advisories.

GHSA-vvv9-9jm4-76jgMediumCVSS 6.5

Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to verify that...

Vendor

GitHub Security Advisories

Published

July 13, 2026

Last Modified

July 13, 2026

🔗 CVE IDs covered (1)

CVE-2026-10106 →

📋 Description

Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to verify that the channel referenced in an action cookie matches the channel of the target post, which allows an authenticated user without access to a private channel to trigger interactive post actions on posts in that channel via a cookie obtained from any accessible channel.. Mattermost Advisory ID: MMSA-2026-00690

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-10106
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-vvv9-9jm4-76jg