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CVE Vulnerability Details :
CVE-2026-42301
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-09 May, 2026 | 03:59
Updated At-09 May, 2026 | 03:59
Rejected At-
▼CVE Numbering Authority (CNA)
Improper Input Validation leading to Improper Control of Generation of Code ('Code Injection') in pyp2spec

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.

Affected Products
Vendor
befeleme
Product
pyp2spec
Versions
Affected
  • < 0.14.1
Problem Types
TypeCWE IDDescription
CWECWE-20CWE-20: Improper Input Validation
CWECWE-94CWE-94: Improper Control of Generation of Code ('Code Injection')
Type: CWE
CWE ID: CWE-20
Description: CWE-20: Improper Input Validation
Type: CWE
CWE ID: CWE-94
Description: CWE-94: Improper Control of Generation of Code ('Code Injection')
Metrics
VersionBase scoreBase severityVector
3.17.8HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Version: 3.1
Base score: 7.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/befeleme/pyp2spec/security/advisories/GHSA-r35x-v8p8-xvhw
x_refsource_CONFIRM
https://github.com/befeleme/pyp2spec/releases/tag/v0.14.1
x_refsource_MISC
Hyperlink: https://github.com/befeleme/pyp2spec/security/advisories/GHSA-r35x-v8p8-xvhw
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/befeleme/pyp2spec/releases/tag/v0.14.1
Resource:
x_refsource_MISC
Details not found