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CVE-2026-56382— Craft CMS - Remote Code Execution via Missing Config Sanitization in FieldsController

Quick assessment

Affected
craftcms cms
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CraftCMS cms是CraftCMS的内容管理系统。 Craft CMS 5.5.0版本至5.9.13版本存在代码注入漏洞，该漏洞源于FieldsController::actionRenderCardPreview()方法未调用Component::cleanseConfig()，将fieldLayoutConfig POST参数直接传递给Fields::createLayout()，可能导致经过身份验证的管理员用户注入Yii2事件处理程序，执行任意PHP代码并泄露敏感信息。

CVSS 7.2 · High EPSS 0.89% · P58

Affected Version Matrix 2

VendorProduct Version RangeStatus
craftcms cms 5.5.0< 5.9.14 affected
5.9.14 unaffected
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I. Basic Information for CVE-2026-56382

Vulnerability Information
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Vulnerability Title
Craft CMS - Remote Code Execution via Missing Config Sanitization in FieldsController
Source: CVE Program / CVE List V5
Vulnerability Description
Craft CMS (composer package craftcms/cms) versions >= 5.5.0 and <= 5.9.13 contain a remote code execution vulnerability in the FieldsController::actionRenderCardPreview() method, which passes the fieldLayoutConfig POST parameter directly to Fields::createLayout() without calling Component::cleanseConfig(). An authenticated admin user can inject Yii2 event handlers (e.g., 'on init' keys) via the fieldLayoutConfig parameter to execute arbitrary PHP code and disclose sensitive information (such as environment variables containing database credentials and CRAFT_SECURITY_KEY). The issue is fixed in version 5.9.14.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Craft CMS 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CraftCMS cms是CraftCMS的内容管理系统。 Craft CMS 5.5.0版本至5.9.13版本存在代码注入漏洞，该漏洞源于FieldsController::actionRenderCardPreview()方法未调用Component::cleanseConfig()，将fieldLayoutConfig POST参数直接传递给Fields::createLayout()，可能导致经过身份验证的管理员用户注入Yii2事件处理程序，执行任意PHP代码并泄露敏感信息。
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 5.5.0 ~ 5.9.14 -

II. Public POCs for CVE-2026-56382

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8413 chars
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III. Intelligence Information for CVE-2026-56382

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Vendor Advisories for CVE-2026-56382 (2)

Same Patch Batch · craftcms · 2026-06-21 · 7 CVEs total

CVE-2026-56394 6.5 MEDIUM Craft CMS - Authenticated Path Traversal in assets/icon Extension Parameter
CVE-2026-56381 4.8 MEDIUM Craft CMS - Stored XSS via User Group Name in User Permissions Page
CVE-2026-56383 4.8 MEDIUM Craft CMS - Stored XSS in Table Field via Row Heading Column Type
CVE-2026-56393 4.8 MEDIUM Craft CMS - Multiple Stored Cross-Site Scripting in Settings Names and Field Options
CVE-2026-56384 4.3 MEDIUM Craft CMS - Missing Authorization in assets/preview-thumb Endpoint
CVE-2026-56385 4.3 MEDIUM Craft CMS - Authorization Bypass in assets/preview-file Endpoint

IV. Related Vulnerabilities

Same product: cms
Same vendor: craftcms
Same weakness: CWE-94

V. Comments for CVE-2026-56382

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