Vulnerability Description
Craft CMS 5.0.0-RC1 before 5.10.6 and 4.0.0-RC1 before 4.18.2 contain an arbitrary file read vulnerability. The create() Twig function restricts class instantiation using a 5-entry blocklist that does not include SplFileObject, allowing an authenticated administrator (with allowAdminChanges=true) to configure a malicious entry type title or URI format that instantiates SplFileObject in a non-sandboxed template context. When a user subsequently creates an entry in the affected section, arbitrary files on the server (such as .env containing the security key and database credentials) are read and rendered as entry titles.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/craftcms/cms/security/advisories/GHSA-957r-qf9p-67xw
- https://www.vulncheck.com/advisories/craft-cms-rc1-before-arbitrary-file-read-vi
FAQ
What is CVE-2026-72779?
CVE-2026-72779 is a vulnerability with a CVSS score of 4.5 (MEDIUM). Craft CMS 5.0.0-RC1 before 5.10.6 and 4.0.0-RC1 before 4.18.2 contain an arbitrary file read vulnerability. The create() Twig function restricts class instantiation using a 5-entry blocklist that does...
How severe is CVE-2026-72779?
CVE-2026-72779 has been rated MEDIUM with a CVSS base score of 4.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-72779?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.