CVE-2026-4055

CVE-2026-4055CVE-2026-4055

mattermost / mattermost_server

Description

Mattermost versions 11.5.x <= 11.5.1 fail to validate team-level run_create permission against the target team when creating a playbook run which allows an authenticated team member to create runs in teams where they lack permission via specifying a different team ID in the run creation API request. Mattermost Advisory ID: MMSA-2026-00629

Scoring

CVSS 4.3 ()
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Last modified2026-07-23
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.