CVE-2026-31857

Craft is a content management system (CMS). Prior to 5.9.9 and 4.17.4, a Remote Code Execution vulnerability exists in the Craft CMS 5 conditions system. The BaseElementSelectConditionRule::getElementIds() method passes user-controlled string input through renderObjectTemplate() -- an unsandboxed Twig rendering function with escaping disabled. Any authenticated Control Panel user (including non-admin roles such as Author or Editor) can achieve full RCE by sending a crafted condition rule via standard element listing endpoints. This vulnerability requires no admin privileges, no special permissions beyond basic control panel access, and bypasses all production hardening settings (allowAdminChanges: false, devMode: false, enableTwigSandbox: true). Users should update to the patched 5.9.9 or 4.17.4 release to mitigate the issue.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/craftcms/cms/commit/8d4903647dcfd31b8d40ed027e27082013347a80	Patch
https://github.com/craftcms/cms/security/advisories/GHSA-fp5j-j7j4-mcxc	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:craftcms:craft_cms::::::::
	cpe:2.3:a:craftcms:craft_cms::::::::
	cpe:2.3:a:craftcms:craft_cms:4.0.0:-::::::
	cpe:2.3:a:craftcms:craft_cms:4.0.0:beta1::::::
	cpe:2.3:a:craftcms:craft_cms:4.0.0:beta2::::::
	cpe:2.3:a:craftcms:craft_cms:4.0.0:beta3::::::
	cpe:2.3:a:craftcms:craft_cms:4.0.0:beta4::::::
	cpe:2.3:a:craftcms:craft_cms:4.0.0:rc1::::::
	cpe:2.3:a:craftcms:craft_cms:4.0.0:rc2::::::
	cpe:2.3:a:craftcms:craft_cms:4.0.0:rc3::::::
	cpe:2.3:a:craftcms:craft_cms:5.0.0:-::::::
	cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1::::::

History

No history.

Information

Published : 2026-03-11 18:16

Updated : 2026-03-17 14:15

NVD link : CVE-2026-31857

Mitre link : CVE-2026-31857

CVE.ORG link : CVE-2026-31857

JSON object : View

Products Affected

craftcms

craft_cms

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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