CVE-2026-42301— Improper Input Validation leading to Improper Control of Generation of Code ('Code Injection') in pyp2spec
Quick assessment
Affected
befeleme pyp2spec
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.
pyp2spec是Karolina Surma个人开发者的一个生成Fedora RPM规范文件的Python工具。 pyp2spec 0.14.1之前版本存在输入验证错误漏洞，该漏洞源于在生成spec文件时未转义RPM宏指令，可能导致恶意包在构建机器上执行任意命令。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-42301
Vulnerability Information
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Vulnerability Title
Improper Input Validation leading to Improper Control of Generation of Code ('Code Injection') in pyp2spec
Source: CVE Program / CVE List V5
Vulnerability Description
pyp2spec generates working Fedora RPM spec file for Python projects. Prior to version 0.14.1, pyp2spec was writing PyPI package metadata (e.g. the summary field) into the generated spec file without escaping RPM macro directives. When a packager then runs rpmbuild, those directives get evaluated, so a malicious package can execute arbitrary commands on the build machine. This issue has been patched in version 0.14.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
pyp2spec 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pyp2spec是Karolina Surma个人开发者的一个生成Fedora RPM规范文件的Python工具。 pyp2spec 0.14.1之前版本存在输入验证错误漏洞，该漏洞源于在生成spec文件时未转义RPM宏指令，可能导致恶意包在构建机器上执行任意命令。
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
II. Public POCs for CVE-2026-42301
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
Qwen3.6-35B-A3B
· 7763 chars
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III. Intelligence Information for CVE-2026-42301
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Vendor Advisories for CVE-2026-42301 (1)
Other References for CVE-2026-42301 (1)
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🔗 Release v0.14.1 · befeleme/pyp2spec · GitHub x_refsource_MISC
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V. Comments for CVE-2026-42301
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