CVE-2026-33157
March 24, 2026
Craft CMS is a content management system (CMS). From version 5.6.0 to before version 5.9.13, a Remote Code Execution (RCE) vulnerability exists in Craft CMS, it can be exploited by any authenticated user with control panel access. This is a bypass of a previous fix. The existing patches add cleanseConfig() to assembleLayoutFromPost() and various FieldsController actions to strip Yii2 behavior/event injection keys ("as" and "on" prefixed keys). However, the fieldLayouts parameter in ElementIndexesController::actionFilterHud() is passed directly to FieldLayout::createFromConfig() without any sanitization, enabling the same behavior injection attack chain. This issue has been patched in version 5.9.13.
Affected Packages
https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=@craftcms/sass@1.0.0 <4.17.7Fix Suggestion:
Update to version 4.17.7https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=5.9.0 <5.9.17Fix Suggestion:
Update to version 5.9.17https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=5.9.0 <5.9.17Fix Suggestion:
Update to version 5.9.17https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=5.9.0 <5.9.14Fix Suggestion:
Update to version 5.9.14https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=5.9.0 <5.9.16Fix Suggestion:
Update to version 5.9.16https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=5.9.0 <5.9.16Fix Suggestion:
Update to version 5.9.16https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=5.9.0 <5.9.13Fix Suggestion:
Update to version 5.9.13https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=5.9.0 <5.9.16Fix Suggestion:
Update to version 5.9.16https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=4.17.0 <4.17.10Fix Suggestion:
Update to version 4.17.10https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=5.9.0 <5.9.15Fix Suggestion:
Update to version 5.9.15https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=4.17.0 <4.17.8Fix Suggestion:
Update to version 4.17.8https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=5.9.0 <5.9.17Fix Suggestion:
Update to version 5.9.17https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=4.17.0 <4.17.9Fix Suggestion:
Update to version 4.17.9https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=4.17.0 <4.17.11Fix Suggestion:
Update to version 4.17.11craftcms/cms (PHP):
Affected version(s) >=5.6.0 <5.9.13Fix Suggestion:
Update to version 5.9.13Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
EPSS
Base Score:
0.04
