CVE-2026-42301

Improper Input Validation leading to Improper Control of Generation of Code ('Code Injection') in pyp2spec

State: Published
Severity: 7.8 High
Published: May 9, 2026
Updated: May 11, 2026
Reserved: Apr 26, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-20 Improper Input Validation
CWE-94 Improper Control of Generation of Code ('Code Injection')

Affected Products

Product	Versions
pyp2specbefeleme	< 0.14.1Affected

References

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