CVE-2026-6342
Medium · 4.3CVSS
4.3
EPSS
0.3%
Published
May 18, 2026
CISA due date
—
The record
Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to appropriately check for valid namespaces which allows plugin users to create subscriptions to groups that were not whitelisted via creating groups that share the same prefix as a whitelisted group. Mattermost Advisory ID: MMSA-2026-00601
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
Related vulnerabilities
- CVE-2026-96398 Incorrect Authorization vulnerability in Drupal Webform allows Forceful Browsing. CWE-863
- CVE-2026-96384 Incorrect Authorization vulnerability in Drupal Mermaid Diagram Field allows Forceful… CWE-863
- CVE-2026-96370 Incorrect Authorization vulnerability in Drupal Webform allows Server Side Request… CWE-863
- CVE-2026-96373 Incorrect Authorization vulnerability in Drupal Webform allows Forceful Browsing. CWE-863
- CVE-2026-96366 Incorrect Authorization vulnerability in Drupal Webform allows Forceful Browsing. CWE-863
- CVE-2026-96356 Incorrect Authorization vulnerability in Drupal Webform allows Forceful Browsing. CWE-863
- CVE-2026-84917 Incorrect Authorization vulnerability in Drupal Jsonapi Role Access allows Forceful… CWE-863
- CVE-2026-84920 Incorrect Authorization vulnerability in Drupal Unpublished Node Permissions allows… CWE-863