CVE-2026-31857
CraftCMS has an RCE vulnerability via relational conditionals in the control panel
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.
| CWE | CWE-94 |
| Vendor | craftcms |
| Product | cms |
| Published | Mar 11, 2026 |
| Last Updated | Mar 12, 2026 |
Get instant alerts for craftcms cms
Be the first to know when new unknown vulnerabilities affecting craftcms cms are published — delivered to Slack, Telegram or Discord.