CVE-2026-42301 HIGH

CVE-2026-42301: Improper Input Validation leading to Improper Control of Generation of Code ('Code Injection') in pyp2spec

Vendor Befeleme
Product pyp2spec
Weakness CWE-20 · Input validation
Published May 9, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

7.8/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 9, 2026 CVE published
May 11, 2026 Record updated