# CVE-2026-33157

## Summary

- **CVE ID:** CVE-2026-33157
- **Severity:** HIGH
- **CVSS Score:** 8.6 (CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-470
- **Published:** Mar 24, 2026
- **Last Modified:** Mar 25, 2026

## 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.

## Affected Products

- craftcms — cms (>= 5.6.0, < 5.9.13)

## References

- [CNA](https://github.com/craftcms/cms/security/advisories/GHSA-2fph-6v5w-89hh)
- [CNA](https://github.com/craftcms/cms/commit/97e90b4bdee369c1af3ca77a77531132df240e4e)
- [CNA](https://github.com/craftcms/cms/releases/tag/5.9.13)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.02%
- **EPSS Percentile:** 61.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._