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CVE-2026-79774— Winter CMS before 1.2.13 Twig Sandbox Escape via SecurityPolicy

Quick assessment

Affected
wintercms winter
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Winter CMS 1.2.13 之前的版本中存在一个不完整的修复，涉及 System\\Twig\\SecurityPolicy 中 Twig 沙箱逃逸漏洞。该漏洞允许拥有模板编辑权限的已认证后端用户绕过沙箱限制。攻击者可以通过 Eloquent 模型和查询构建器中的方法转发（例如 saveQuietly()、deleteQuietly()、increment()、decrement() 和 newQuery()）来读取和修改任意数据库记录，执行任意 SQL 语句，并通过在模板代码中注入 PHP 代码实现远程代

CVSS 8.4 · High

Affected Version Matrix 2

VendorProduct Version RangeStatus
wintercms winter 1.2.7< 1.2.13 affected
1.2.13 unaffected
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I. Basic Information for CVE-2026-79774

Vulnerability Information
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Vulnerability Title
Winter CMS before 1.2.13 Twig Sandbox Escape via SecurityPolicy
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
wintercms winter 1.2.7 ~ 1.2.13 -

II. Public POCs for CVE-2026-79774

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8068 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-79774

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Vendor Advisories for CVE-2026-79774 (2)

IV. Related Vulnerabilities

Same product: winter
Same vendor: wintercms
Same weakness: CWE-693

V. Comments for CVE-2026-79774

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