What is GHSA-8jmp-2xx6-pjg7?

GHSA-8jmp-2xx6-pjg7 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 validate that...

Which CVE IDs does GHSA-8jmp-2xx6-pjg7 cover?

GHSA-8jmp-2xx6-pjg7 covers the following CVE IDs: CVE-2026-9708. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-8jmp-2xx6-pjg7?

GHSA-8jmp-2xx6-pjg7 has a CVSS v3 base score of 4.9, published by GitHub Security Advisories.

GHSA-8jmp-2xx6-pjg7MediumCVSS 4.9

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

Vendor

GitHub Security Advisories

Published

July 13, 2026

Last Modified

July 13, 2026

🔗 CVE IDs covered (1)

CVE-2026-9708 →

📋 Description

Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to validate that an assigned incoming webhook user has access to the target team or channel, which allows a requester with webhook management permissions to create posts or direct messages attributed to another user via crafted incoming webhook configuration and payloads.. Mattermost Advisory ID: MMSA-2026-00683

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-9708
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-8jmp-2xx6-pjg7