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CVE-2026-33157— Craft CMS: Potential authenticated Remote Code Execution via malicious attached Behavior

Quick assessment

Affected
craftcms cms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Craft CMS是Craft CMS开源的一套内容管理系统（CMS）。 Craft CMS 5.9.13之前版本存在安全漏洞，该漏洞源于fieldLayouts参数未经清理直接传递，可能导致远程代码执行。

AI Predicted 8.8 Difficulty: Easy EPSS 1.06% · P63
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I. Basic Information for CVE-2026-33157

Vulnerability Information
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Vulnerability Title
Craft CMS: Potential authenticated Remote Code Execution via malicious attached Behavior
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
使用外部可控制的输入来选择类或代码(不安全的反射)
Source: CVE Program / CVE List V5
Vulnerability Title
Craft CMS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Craft CMS是Craft CMS开源的一套内容管理系统（CMS）。 Craft CMS 5.9.13之前版本存在安全漏洞，该漏洞源于fieldLayouts参数未经清理直接传递，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
craftcms cms >= 5.6.0, < 5.9.13 -

II. Public POCs for CVE-2026-33157

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III. Intelligence Information for CVE-2026-33157

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Patches & Fixes for CVE-2026-33157 (1)

Vendor Advisories for CVE-2026-33157 (1)

Vendor Pages for CVE-2026-33157 (1)

Same Patch Batch · craftcms · 2026-03-24 · 6 CVEs total

CVE-2026-33160 Craft CMS: Anonymous "generate transform" calls for assets can expose private assets via t
CVE-2026-33162 Craft CMS: Authorization bypass in "entries/move-to-section" allows control panel user to
CVE-2026-33158 Craft CMS: Low-privilege users could read private asset contents when editing an asset (ID
CVE-2026-33161 Craft CMS: Anonymous "assets/image-editor" calls returns private asset editor metadata to
CVE-2026-33159 Craft CMS: Unauthenticated users could execute project configuration sync operations that

IV. Related Vulnerabilities

Same product: cms
Same vendor: craftcms
Same weakness: CWE-470

V. Comments for CVE-2026-33157

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