CVE-2026-79774Winter CMS before 1.2.13 Twig Sandbox Escape via SecurityPolicy
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 8.4 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-693
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
wintercms winter wintercms:winter (from the name) | from 1.2.7 before 1.2.13; 1.2.13 not affected | CNA record |
References
- https://github.com/wintercms/winter/security/advisories/GHSA-8cfw-pcwh-v63wvendor-advisory
- https://github.com/wintercms/winter/commit/725bbcda232466f7f71381c271c6916573d576e6patch
- https://www.vulncheck.com/advisories/winter-cms-before-twig-sandbox-escape-via-securitypolicythird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.