CVE-2026-33157
Craft CMS is a content management system (CMS). From version 5.6.0 to before version 5.9.13, a Remote Code Execution (RCE) vulnerability exists in Craft CMS, it can be exploited by any authenticated user with control panel access. This is a bypass of a previous fix. The existing patches add cleanseConfig() to assembleLayoutFromPost() and various FieldsController actions to strip Yii2 behavior/event injection keys ("as" and "on" prefixed keys). However, the fieldLayouts parameter in ElementIndexesController::actionFilterHud() is passed directly to FieldLayout::createFromConfig() without any sanitization, enabling the same behavior injection attack chain. This issue has been patched in version 5.9.13.
- Score
- CVSS 4.0 8.6 High
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-03-24
- Last modified
- 2026-03-25
- Weaknesses
- CWE-470
Affected products
References
- https://github.com/craftcms/cms/commit/97e90b4bdee369c1af3ca77a77531132df240e4e
- https://github.com/craftcms/cms/releases/tag/5.9.13
- https://github.com/craftcms/cms/security/advisories/GHSA-2fph-6v5w-89hh
