What’s Vulnerable › Vulnerabilities

CVE-2026-44011: Craft CMS: Potential authenticated Remote Code Execution via malicious attached Behavior

• Severity: high (CVSS 8.6 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-12 · updated 2026-10-26
• Weakness: CWE-479

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.

Affected products

• craftcms cms: from 4.0.0, < 4.17.12; from 5.0.0, < 5.9.18

References

• https://github.com/craftcms/cms/commit/ab85ca7f5f926994f723f60584054a1f4c4c5de3
• https://github.com/craftcms/cms/security/advisories/GHSA-qrgm-p9w5-rrfw
• https://github.com/craftcms/cms/security/advisories/GHSA-qrgm-p9w5-rrfw

Get alerted when CVE-2026-44011 or the next vulnerability affects your stack