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CVE-2026-79988— Authenticated RCE through Twig sandbox escape

Quick assessment

Affected
craftcms cms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Craft CMS是Craft CMS公司的一套内容管理系统(CMS)。 Craft CMS 4.0.0-RC1至4.18.3之前版本和5.0.0-RC1至5.10.7之前版本存在处理逻辑错误漏洞，该漏洞源于Twig沙箱机制配置不当，允许来自Yii框架的危险功能，可能导致经过身份验证的攻击者实施远程代码执行。

CVSS 8.7 · High EPSS 0.45% · P37

Affected Version Matrix 2

VendorProduct Version RangeStatus
craftcms cms 4.0.0-RC1< 4.18.3 affected
5.0.0-RC1< 5.10.7 affected
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I. Basic Information for CVE-2026-79988

Vulnerability Information
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Vulnerability Title
Authenticated RCE through Twig sandbox escape
Source: CVE Program / CVE List V5
Vulnerability Description
The Twig sandbox mechanism in Craft CMS is configured to allow dangerous functionality from the Yii framework, leading to authenticated RCE similar to previously disclosed vulnerabilities.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
Source: CVE Program / CVE List V5
Vulnerability Title
Craft CMS 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Craft CMS是Craft CMS公司的一套内容管理系统(CMS)。 Craft CMS 4.0.0-RC1至4.18.3之前版本和5.0.0-RC1至5.10.7之前版本存在处理逻辑错误漏洞，该漏洞源于Twig沙箱机制配置不当，允许来自Yii框架的危险功能，可能导致经过身份验证的攻击者实施远程代码执行。
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
craftcms cms 4.0.0-RC1 ~ 4.18.3 -

II. Public POCs for CVE-2026-79988

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III. Intelligence Information for CVE-2026-79988

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Security Blog Posts for CVE-2026-79988 (1)

Vendor Pages for CVE-2026-79988 (2)

IV. Related Vulnerabilities

Same product: cms
Same vendor: craftcms
Same weakness: CWE-693

V. Comments for CVE-2026-79988

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