Vulnerability Description
Craft CMS is a content management system (CMS). In versions 5.9.0 and above prior to 5.10.0, control panel users with the ability to edit entries can execute unsandboxed Twig code via the HTTP Referrer header, potentially leading to authenticated RCE. The issue happens when a user is saving entries. Strings for a signed redirect URL are being compiled as a Twig template via renderObjectTemplate(), and while a sandboxed alternative already exists (renderSandboxedObjectTemplate()), it is not used in this case. This signed URL can be specified by users, as it is reflected in the “Referer” HTTP request header, which is under attacker control. This issue has been fixed in version 5.10.0.
Related Weaknesses (CWE)
References
- https://github.com/craftcms/cms/pull/18680
- https://github.com/craftcms/cms/security/advisories/GHSA-f74w-488g-8x5r
FAQ
What is CVE-2026-55794?
CVE-2026-55794 is a documented vulnerability. Craft CMS is a content management system (CMS). In versions 5.9.0 and above prior to 5.10.0, control panel users with the ability to edit entries can execute unsandboxed Twig code via the HTTP Referre...
How severe is CVE-2026-55794?
CVSS scoring is not yet available for CVE-2026-55794. Check NVD for updates.
Is there a patch for CVE-2026-55794?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.