CVE-2026-41128

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.

PUBLISHED Reserved 2026-04-17 | Published 2026-04-21 | Updated 2026-04-22 | Assigner GitHub_M

Problem types

CWE-862: Missing Authorization

Product status

References

github.com/...ms/cms/security/advisories/GHSA-jq2f-59pj-p3m3

github.com/...ommit/b135384808ad43fcf8836a9dd9b877fb0087bc27

cve.org (CVE-2026-41128)

nvd.nist.gov (CVE-2026-41128)

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