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CVE-2026-4286

LOW CVSS: 3.1 Published: 2026-05-18 Modified: 2026-06-17

Description

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being changed when updating playbooks, allowing users with only {{Manage Playbook Configurations}} permission to change a playbook's team, bypassing manage members restriction via PUT api. Mattermost Advisory ID: MMSA-2025-00552

Affected Platforms

Mattermost Mattermost Server

Weakness Type

CWE-863

References