🛡️ CVE-2026-6739
🟡 CVSS 6.7 — Medium ✅ No Known Exploit CWE-863 NVD
6.7
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to require system-level permission when patching protected default system roles, which allows authenticated users with delegated user-management permissions to escalate privileges by altering built-in role permissions via the role patch API.. Mattermost Advisory ID: MMSA-2026-00656

Details

Severity MEDIUM
CVSS Score 6.7
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
CWE CWE-863
Public Exploit ✅ No
Source NVD
Published 2026-06-12
Updated 2026-06-13
Modified 2026-06-12
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown

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