CVE-2026-79774

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 v3 8.4 HIGH

8.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.7 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/wintercms/winter/commit/725bbcda232466f7f71381c271c6916573d576e6
https://github.com/wintercms/winter/security/advisories/GHSA-8cfw-pcwh-v63w
https://www.vulncheck.com/advisories/winter-cms-before-twig-sandbox-escape-via-securitypolicy

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-25 16:17

Updated : 2026-08-31 20:38

NVD link : CVE-2026-79774

Mitre link : CVE-2026-79774

CVE.ORG link : CVE-2026-79774

JSON object : View

Products Affected

No product.

CWE

CWE-693

Protection Mechanism Failure

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