CVE-2026-44011: Craft CMS CMS

High severity, CVSS 8.6. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Craft CMS CMS: from 4.0.0, before 4.17.12 (fixed in 4.17.12); from 5.0.0, before 5.9.18 (fixed in 5.9.18)

Published 2026-05-12. Last modified 2026-06-17.