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.

Affected products

Cms, Craft Cms, Craftcms/Cms

Craftcms Craft Cms

< 4.17.4, 5.9.9, 4.0.0, 5.0.0

Fix

Available

CVSS 4.0

9.3 CRITICAL

CVSS 3.1

8.8 HIGH

EPSS

0.7% (48th percentile)

Weakness

CWE-94

NVD status

Analyzed

Published

2026-03-11

No exploit for CVE-2026-31857 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.