Winter CMS before 1.2.13 Twig Sandbox Escape via SecurityPolicy
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.
CVE-2026-79774
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-79774
winter
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "wintercms",
"product": "winter",
"versions": [
{
"status": "affected",
"version": "1.2.7",
"lessThan": "1.2.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.2.13",
"versionType": "semver"
}
],
"packageURL": "pkg:composer/winter/wn-system-module",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-79774
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #12896 · Revision 1
- Added to Heist Feed
- Publisher date