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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 Winter是Winter CMS组织开源的一个基于Laravel的免费自托管CMS平台。 Winter CMS Winter 1.2.13之前版本存在处理逻辑错误漏洞，该漏洞源于System\Twig\SecurityPolicy中的Twig沙箱逃逸漏洞修复不完整，可能导致经过身份验证且具有模板编辑权限的后端用户绕过沙箱限制，利用Eloquent模型和查询构建器的方法转发读取和修改任意数据库记录、执行任意SQL，并通过注入PHP实现远程代码执行。

CVSS 8.4 · High EPSS 0.81% · P56

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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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

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
Vulnerability Title
Winter CMS Winter 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Winter CMS Winter是Winter CMS组织开源的一个基于Laravel的免费自托管CMS平台。 Winter CMS Winter 1.2.13之前版本存在处理逻辑错误漏洞，该漏洞源于System\Twig\SecurityPolicy中的Twig沙箱逃逸漏洞修复不完整，可能导致经过身份验证且具有模板编辑权限的后端用户绕过沙箱限制，利用Eloquent模型和查询构建器的方法转发读取和修改任意数据库记录、执行任意SQL，并通过注入PHP实现远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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
Pro+ exclusive includes:
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
100+ AI POC generations per month

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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