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CVE-2026-44011GHSA-QRGM-P9W5-RRFW

Craft CMS: Potential authenticated Remote Code Execution via malicious attached Behavior

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.17.12, 5.9.18
6 proofs of concept on GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: total

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • craftcms cms

    From 4.0.0 · fixed in 4.17.12; From 5.0.0 · fixed in 5.9.18

  • craftcms/cmsPackagist

    From 4.0.0 · fixed in 4.17.12

  • craftcms/cmsPackagist

    From 5.0.0 · fixed in 5.9.18

References 8

GitHub · craftcms/cms

GitHub · 0xyngtg/CraftCMS-CVE-2026-44011-PoC-RCE

GitHub · 4xura/CVE-2026-44011-craftcms-auth-rce

GitHub · Cyberuser-hash/CVE-2026-44011-craft-rce-poc

GitHub · DENNISDGR/CVE-2026-44011-poc

GitHub · TRX-0/CVE-2026-44011-craftcms-rce

GitHub · khush-613/CVE-2026-44011-poc