Missing Authorization Affecting craftcms/cms package, versions >=5.6.0, <5.9.15
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Missing Authorization vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-PHP-CRAFTCMSCMS-16109581
- published19 Apr 2026
- disclosed14 Apr 2026
- creditkaminuma
Introduced: 14 Apr 2026
NewCVE-2026-41128 (opens in a new tab)How to fix?
Upgrade craftcms/cms to version 5.9.15 or higher.
Overview
craftcms/cms is a content management system.
Affected versions of this package are vulnerable to Missing Authorization via the actionSavePermissions process. An attacker can remove all group memberships from arbitrary users by submitting an empty groups parameter, resulting in immediate revocation of all permissions inherited from those groups. This is only exploitable if the attacker has a control panel account with accessCp and viewUsers permissions and the application is running the Pro edition or higher.