CVE-2026-41128 Details
Description
Craft CMS is a content management system (CMS). In versions 5.6.0 through 5.9.14, the `actionSavePermissions()` endpoint allows a user with only `viewUsers` permission to remove arbitrary users from all user groups. While `_saveUserGroups()` enforces per-group authorization for additions, it performs no equivalent authorization check for removals, so submitting an empty `groups` value removes all existing group memberships. Version 5.9.15 contains a patch.
An authorization bypass vulnerability has been identified in Craft CMS versions 5.6.0 through 5.9.14. The issue arises in the 'actionSavePermissions()' endpoint, where a user with only 'viewUsers' permission can remove arbitrary users from all user groups. This vulnerability exists because the '_saveUserGroups()' method, which handles group assignments, lacks proper authorization checks for removals. As a result, submitting an empty 'groups' value deletes all existing group memberships. The vulnerability was introduced in version 5.6.0 and affects users with 'accessCp' and 'viewUsers' permissions on the Pro edition or higher.
Users can update to Craft CMS version 5.9.15 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 22, 2026CISA-ADP
Assessed Apr 22, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/craftcms/cms/commit/b135384808ad43fcf8836a9dd9b877fb0087bc27 | [email protected] | Source CodeVendor |
| https://github.com/craftcms/cms/security/advisories/GHSA-jq2f-59pj-p3m3 | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-862 | Missing Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Craft CMS | >= 5.6.0, <= 5.9.14 (semver) |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 22, 2026 | New CVE Received | [email protected] |