CVE-2026-4286
Low · 3.1CVSS
3.1
EPSS
0.1%
Published
May 18, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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