CVE-2026-41128: Craft CMS has a Missing Authorization Check on User Group Removal via save-permissions Action

April 14, 2026 (updated April 24, 2026)

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.

References

github.com/advisories/GHSA-jq2f-59pj-p3m3
github.com/craftcms/cms/commit/b135384808ad43fcf8836a9dd9b877fb0087bc27
github.com/craftcms/cms/security/advisories/GHSA-jq2f-59pj-p3m3
nvd.nist.gov/vuln/detail/CVE-2026-41128

Code Behaviors & Features

Detect and mitigate CVE-2026-41128 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →