Remote Code Execution Vulnerability in Craft CMS by Craft
CVE-2026-33157

8.6HIGH

Key Information:

Vendor

Craftcms

Status
Cms
Vendor
CVE Published:
24 March 2026

What is CVE-2026-33157?

Craft CMS, a leading content management system, has a Remote Code Execution vulnerability affecting versions from 5.6.0 to prior to 5.9.13. This vulnerability allows any authenticated user with control panel access to exploit the system. It arises from a bypass of previous source code patches that added sanitization functions to prevent behavior/event injection. Notably, the fieldLayouts parameter in the ElementIndexesController remains unsanitized, enabling attackers to trigger unintended behavior injection through various methods. The issue has been addressed in the 5.9.13 release, ensuring greater security against such exploits.

Affected Version(s)

cms >= 5.6.0, < 5.9.13

References

https://github.com/craftcms/cms/security/advisories/GHSA-...
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https://github.com/craftcms/cms/commit/97e90b4bdee369c1af...
x_refsource_MISC
https://github.com/craftcms/cms/releases/tag/5.9.13
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CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.