CVE-2026-4286

CVSS Score & Metrics

Base Score

3.1 / 10

Vector String

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

Vulnerability 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

Vulnerability Details

Published Date

May 18, 2026

Last Modified

May 18, 2026

CWE ID

CWE-863

Source

NVD

Vendor

mattermost

Product

mattermost_server

External References

https://mattermost.com/security-updates

CVSS Score & Metrics

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Vulnerability Details

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