Craft CMS is a content management system (CMS). From 4.0.0 to before 4.17.12 and 5.9.18, Craft CMS which contains an input-handling flaw in a Yii object creation path that let any authenticated user inject malicious configuration and execute arbitrary commands on the server. The request-controlled condition field layouts data is converted into a live FieldLayout object without a Component::cleanseConfig() boundary. Because Craft configures models before parent::__construct(), attacker-controlled special config keys can take effect during object creation, and FieldLayout initialization then triggers a same-request event. This vulnerability is fixed in 4.17.12 and 5.9.18.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-qrgm-p9w5-rrfw Craft CMS has Potential Authenticated Remote Code Execution via Malicious Attached Behavior
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 13 May 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 13 May 2026 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Craftcms
Craftcms craftcms
Vendors & Products Craftcms
Craftcms craftcms

Tue, 12 May 2026 21:00:00 +0000

Type Values Removed Values Added
Description Craft CMS is a content management system (CMS). From 4.0.0 to before 4.17.12 and 5.9.18, Craft CMS which contains an input-handling flaw in a Yii object creation path that let any authenticated user inject malicious configuration and execute arbitrary commands on the server. The request-controlled condition field layouts data is converted into a live FieldLayout object without a Component::cleanseConfig() boundary. Because Craft configures models before parent::__construct(), attacker-controlled special config keys can take effect during object creation, and FieldLayout initialization then triggers a same-request event. This vulnerability is fixed in 4.17.12 and 5.9.18.
Title Craft CMS: Potential authenticated Remote Code Execution via malicious attached Behavior
Weaknesses CWE-479
References
Metrics cvssV4_0

{'score': 8.6, 'vector': '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-13T15:37:25.178Z

Reserved: 2026-05-04T21:24:36.505Z

Link: CVE-2026-44011

cve-icon Vulnrichment

Updated: 2026-05-13T15:01:52.312Z

cve-icon NVD

Status : Deferred

Published: 2026-05-12T21:16:15.870

Modified: 2026-05-13T16:16:53.997

Link: CVE-2026-44011

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-13T09:45:09Z

Weaknesses