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
References
| Link | Resource |
|---|---|
| https://mattermost.com/security-updates | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
21 May 2026, 19:45
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | |
| References | () https://mattermost.com/security-updates - Vendor Advisory | |
| First Time |
Mattermost mattermost Server
Mattermost |
21 May 2026, 08:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-21 08:16
Updated : 2026-05-21 19:45
NVD link : CVE-2026-4055
Mitre link : CVE-2026-4055
CVE.ORG link : CVE-2026-4055
JSON object : View
Products Affected
mattermost
- mattermost_server
CWE
CWE-863
Incorrect Authorization