What is GHSA-gvg4-jhmr-6j23?

GHSA-gvg4-jhmr-6j23 is a security advisory published by GitHub Security Advisories with Low severity. Mattermost versions 11.5.x \u003c= 11.5.1, 10.11.x \u003c= 10.11.13 fail to check if {{team_id}} was being...

Which CVE IDs does GHSA-gvg4-jhmr-6j23 cover?

GHSA-gvg4-jhmr-6j23 covers the following CVE IDs: CVE-2026-4286. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-gvg4-jhmr-6j23?

GHSA-gvg4-jhmr-6j23 has a CVSS v3 base score of 3.1, published by GitHub Security Advisories.

GHSA-gvg4-jhmr-6j23LowCVSS 3.1

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being...

Vendor

GitHub Security Advisories

Published

May 18, 2026

Last Modified

May 18, 2026

🔗 CVE IDs covered (1)

CVE-2026-4286 →

📋 Description

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being changed when updating playbooks, allowing users with only {{Manage Playbook Configurations}} permission to change a playbook's team, bypassing manage members restriction via PUT api. Mattermost Advisory ID: MMSA-2025-00552

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-4286
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-gvg4-jhmr-6j23