What is GHSA-m79q-8qf5-v622?

GHSA-m79q-8qf5-v622 is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost doesn't check public/private permissions

Which CVE IDs does GHSA-m79q-8qf5-v622 cover?

GHSA-m79q-8qf5-v622 covers the following CVE IDs: CVE-2026-6343. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-m79q-8qf5-v622?

GHSA-m79q-8qf5-v622 has a CVSS v3 base score of 4.3, published by GitHub Security Advisories.

Which products are affected by GHSA-m79q-8qf5-v622?

GHSA-m79q-8qf5-v622 affects 4 products, including: go/github.com/mattermost/mattermost/server/v8:\u003e= 11.5.0, \u003c 11.5.2; go/github.com/mattermost/mattermost/server/v8:\u003e= 11.4.0, \u003c 11.4.4; go/github.com/mattermost/mattermost/server/v8:\u003e= 10.11.0, \u003c 10.11.14; go/github.com/mattermost/mattermost-plugin-playbooks:\u003c 1.41.1-0.20260309184833-887d9cacb616.

GHSA-m79q-8qf5-v622MediumCVSS 4.3

Mattermost doesn't check public/private permissions

Vendor

GitHub Security Advisories

Published

May 18, 2026

Last Modified

June 1, 2026

🔗 CVE IDs covered (1)

CVE-2026-6343 →

📋 Description

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to check public/private permissions which allows members without these permissions to access public playbooks via /get.. Mattermost Advisory ID: MMSA-2026-00591

🎯 Affected products4

go/github.com/mattermost/mattermost/server/v8:>= 11.5.0, < 11.5.2
go/github.com/mattermost/mattermost/server/v8:>= 11.4.0, < 11.4.4
go/github.com/mattermost/mattermost/server/v8:>= 10.11.0, < 10.11.14
go/github.com/mattermost/mattermost-plugin-playbooks:< 1.41.1-0.20260309184833-887d9cacb616

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-6343
https://mattermost.com/security-updates
https://github.com/mattermost/mattermost-plugin-playbooks/commit/887d9cacb61655d40f20ad9d6e35b408a127c380
https://github.com/advisories/GHSA-m79q-8qf5-v622