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CVE-2026-23742— Skipper arbitrary code execution through lua filters

CVSS 8.8 · High EPSS 0.47% · P38
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I. Basic Information for CVE-2026-23742

Vulnerability Information
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Vulnerability Title
Skipper arbitrary code execution through lua filters
Source: CVE Program / CVE List V5
Vulnerability Description
Skipper is an HTTP router and reverse proxy for service composition. The default skipper configuration before 0.23.0 was -lua-sources=inline,file. The problem starts if untrusted users can create lua filters, because of -lua-sources=inline , for example through a Kubernetes Ingress resource. The configuration inline allows these user to create a script that is able to read the filesystem accessible to the skipper process and if the user has access to read the logs, they an read skipper secrets. This vulnerability is fixed in 0.23.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Skipper 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Skipper是一个用于服务组合的 HTTP 路由器和反向代理。 Skipper 0.23.0之前版本存在安全漏洞，该漏洞源于默认配置允许不受信任用户创建Lua过滤器，可能导致文件系统读取。
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

VendorProductAffected VersionsCPESubscribe
zalandoskipper < 0.23.0 -

II. Public POCs for CVE-2026-23742

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III. Intelligence Information for CVE-2026-23742

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Vendor Advisories for CVE-2026-23742 (1)

Vendor Pages for CVE-2026-23742 (1)

IV. Related Vulnerabilities

Same product: skipper
Same vendor: zalando
Same weakness: CWE-94

V. Comments for CVE-2026-23742

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