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CVE-2026-31857

CraftCMS has an RCE vulnerability via relational conditionals in the control panel

Published: Mar 11, 2026Updated: Mar 17, 2026 Sources: CVE List NVD GHSACWE-94
NVD MITRE
8.8CVSSHIGH
EPSS Score
0.7%
Top 53.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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 Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-94

Affected Products

craft cmscraftcmsWeb & CMS Plugins
craftcms/cmsPackagistOSS Libraries
cmscraftcmsWeb & CMS Plugins
craftcmscommercialNZWeb & CMS Plugins
packagistpackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
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References

https://github.com/craftcms/cms/commit/8d4903647dcfd31b8d40ed027e27082013347a80
github.com
https://github.com/craftcms/cms/security/advisories/GHSA-fp5j-j7j4-mcxc
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-31857
nvd.nist.gov
and 1 more references View all →

Timeline

Published
Mar 11, 2026
Last Updated
Mar 17, 2026

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