What is GHSA-cgr5-gh7v-f893?

GHSA-cgr5-gh7v-f893 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 Mattermost failed to restrict OAuth...

Which CVE IDs does GHSA-cgr5-gh7v-f893 cover?

GHSA-cgr5-gh7v-f893 covers the following CVE IDs: CVE-2026-16045. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-cgr5-gh7v-f893?

GHSA-cgr5-gh7v-f893 has a CVSS v3 base score of 4.3, published by GitHub Security Advisories.

GHSA-cgr5-gh7v-f893MediumCVSS 4.3

Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 Mattermost failed to restrict OAuth...

Vendor

GitHub Security Advisories

Published

August 17, 2026

Last Modified

August 17, 2026

🔗 CVE IDs covered (1)

CVE-2026-16045 →

📋 Description

Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 Mattermost failed to restrict OAuth deauthorization and personal access token management endpoints to direct user sessions, which allowed an OAuth app with a delegated user token to revoke the user's authorizations or tokens for other integrations via account-management endpoints.. Mattermost Advisory ID: MMSA-2026-00704

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-16045
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-cgr5-gh7v-f893