CVE-2026-4055
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 authenticat…
Published May 21, 2026 · updated Jul 23, 2026 · mattermost mattermost server
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
Code
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No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
May 21, 2026 · NIST NVD
Detected
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
Jul 23, 2026 · NIST NVD
Updated
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
Affected
- cpe mattermost/mattermost serverversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-4055
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-4055
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 c
nvd.nist.gov