Path traversal in integration action URL leading to arbitrary API execution via system admin’s auth token.
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via system admin Mattermost auth token using via path traversal in integration action URL.. Mattermost Advisory ID: MMSA-2026-00640
Problem Types
| Type | CWE ID | Description |
|---|
| CWE | CWE-22 | CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') |
Type: CWE
Description: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Metrics
| Version | Base score | Base severity | Vector |
|---|
| 3.1 | 8.0 | HIGH | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H |
Version: 3.1
Base score: 8.0
Base severity: HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H