GitHub Advisoryadvisory · Go

GHSA-m79q-8qf5-v622 Mattermost doesn't check public/private permissions

MEDIUM Published 2026-05-18 Modified 2026-06-01 Official page ↗
Aliases
CVE-2026-6343
Ecosystem
Go
Packages
github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-plugin-playbooks
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weaknesses
CWE-863
Reviewed
2026-06-01

Affected packages

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

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

Related

Alias · CVE (1)

  • CVE-2026-6343 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… vulnerability

Weakness · CWE (1)

  • CWE-863 Incorrect Authorization weakness

References