What is GHSA-2273-qcv6-r2xj?

GHSA-2273-qcv6-r2xj is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost versions 11.7.x \u003c= 11.7.11 fail to validate null elements when decoding playbook...

Which CVE IDs does GHSA-2273-qcv6-r2xj cover?

GHSA-2273-qcv6-r2xj covers the following CVE IDs: CVE-2026-13411. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-2273-qcv6-r2xj?

GHSA-2273-qcv6-r2xj has a CVSS v3 base score of 4.3, published by GitHub Security Advisories.

GHSA-2273-qcv6-r2xjMediumCVSS 4.3

Mattermost versions 11.7.x <= 11.7.11 fail to validate null elements when decoding playbook...

Vendor

GitHub Security Advisories

Published

October 22, 2026

Last Modified

October 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-13411 →

📋 Description

Mattermost versions 11.7.x <= 11.7.11 fail to validate null elements when decoding playbook import conditions which allows an authenticated attacker to crash the Playbooks plugin instance-wide via a crafted import request containing a null condition. Mattermost Advisory ID: MMSA-2026-00709

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-13411
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-2273-qcv6-r2xj