CVE-2026-44011
Craft CMS: Potential authenticated Remote Code Execution via malicious attached Behavior
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
- craftcms · cms
- CVSS v4.0 GITHUB
- 8.6 HIGH
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v4.0 GitHub
- 8.6 HIGH
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 - EPSS
- 0.44% chance of exploitation in the next 30 days, 37th percentile
- Published
- 2026-05-12
- Updated
- 2026-05-13
Proof-of-concept exploits (6)
- 4xura/CVE-2026-44011-craftcms-auth-rce6★ · 2026-09-27
- DENNISDGR/CVE-2026-44011-poc0★ · 2026-09-27
- Cyberuser-hash/CVE-2026-44011-craft-rce-poc2★ · 2026-09-27
- khush-613/CVE-2026-44011-poc1★ · 2026-09-27
- 0xyngtg/CraftCMS-CVE-2026-44011-PoC-RCE0★ · 2026-10-02
- TRX-0/CVE-2026-44011-craftcms-rce0★ · 2026-09-21