CVE-2026-6739

Mattermost: Delegated admins could patch protected default system roles

CVSS 6.7 MEDIUMEPSS 0.3%CWE-863

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

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L

Productos afectados

Mattermost · Mattermost

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Referencias

https://mattermost.com/security-updates