Vulnerability Description
Winter CMS versions before 1.2.13 contain an incomplete fix for a Twig sandbox escape vulnerability in System\\Twig\\SecurityPolicy that allows authenticated backend users with template-editing permissions to bypass sandbox restrictions. Attackers can exploit method forwarding through Eloquent models and query builders using methods like saveQuietly(), deleteQuietly(), increment(), decrement(), and newQuery() to read and modify arbitrary database records, execute arbitrary SQL, and achieve remote code execution by injecting PHP into template code sections.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/wintercms/winter/commit/725bbcda232466f7f71381c271c6916573d57
- https://github.com/wintercms/winter/security/advisories/GHSA-8cfw-pcwh-v63w
- https://www.vulncheck.com/advisories/winter-cms-before-twig-sandbox-escape-via-s
FAQ
What is CVE-2026-79774?
CVE-2026-79774 is a vulnerability with a CVSS score of 8.4 (HIGH). Winter CMS versions before 1.2.13 contain an incomplete fix for a Twig sandbox escape vulnerability in System\\Twig\\SecurityPolicy that allows authenticated backend users with template-editing permis...
How severe is CVE-2026-79774?
CVE-2026-79774 has been rated HIGH with a CVSS base score of 8.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-79774?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.