Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Craftcms | Craft Cms | >= 5.6.0, < 5.9.13 |
Related Weaknesses (CWE)
References
- https://github.com/craftcms/cms/commit/97e90b4bdee369c1af3ca77a77531132df240e4ePatch
- https://github.com/craftcms/cms/releases/tag/5.9.13Release Notes
- https://github.com/craftcms/cms/security/advisories/GHSA-2fph-6v5w-89hhExploitVendor Advisory
FAQ
What is CVE-2026-33157?
CVE-2026-33157 is a vulnerability with a CVSS score of 7.2 (HIGH). 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 u...
How severe is CVE-2026-33157?
CVE-2026-33157 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33157?
Check the references section above for vendor advisories and patch information. Affected products include: Craftcms Craft Cms.