What is GHSA-2883-3c4j-4mvv?

GHSA-2883-3c4j-4mvv 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 fail to enforce run-state validation on...

Which CVE IDs does GHSA-2883-3c4j-4mvv cover?

GHSA-2883-3c4j-4mvv covers the following CVE IDs: CVE-2026-16046. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-2883-3c4j-4mvv?

GHSA-2883-3c4j-4mvv has a CVSS v3 base score of 4.3, published by GitHub Security Advisories.

GHSA-2883-3c4j-4mvvMediumCVSS 4.3

Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to enforce run-state validation on...

Vendor

GitHub Security Advisories

Published

August 17, 2026

Last Modified

August 17, 2026

🔗 CVE IDs covered (1)

CVE-2026-16046 →

📋 Description

Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to enforce run-state validation on write operations for finished playbook runs which allows a run participant to modify status, checklists, retrospective content, ownership, and participants on completed runs via REST and GraphQL API requests. Mattermost Advisory ID: MMSA-2026-00675

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-16046
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-2883-3c4j-4mvv