What is GHSA-j85c-qqpv-57m3?

GHSA-j85c-qqpv-57m3 is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost versions 11.9.x \u003c= 11.9.1, 11.8.x \u003c= 11.8.5, 11.7.x \u003c= 11.7.10, 11.10.x \u003c= 11.10.1...

Which CVE IDs does GHSA-j85c-qqpv-57m3 cover?

GHSA-j85c-qqpv-57m3 covers the following CVE IDs: CVE-2026-96259. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-j85c-qqpv-57m3?

GHSA-j85c-qqpv-57m3 has a CVSS v3 base score of 5.5, published by GitHub Security Advisories.

GHSA-j85c-qqpv-57m3MediumCVSS 5.5

Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1...

Vendor

GitHub Security Advisories

Published

September 22, 2026

Last Modified

September 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-96259 →

📋 Description

Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to apply the internal-connection filter to OAuth endpoint requests, which allows a System Administrator to make the server issue requests to internal network addresses and read the responses via the configured OAuth token and userinfo endpoints.. Mattermost Advisory ID: MMSA-2026-00776

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-96259
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-j85c-qqpv-57m3