CVE-2026-42301

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 90% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
9.7%
KEV
Not listed

Published

May 9, 2026

Last Modified

May 13, 2026

Advisory Details (2)

Auto-updated May 9, 2026
Patch available. Sources: github.
github Patch Available

Improper Input Validation leading to Improper Control of Generation of Code ('Code Injection') in pyp2spec · Advisory · befeleme/pyp2spec · GitHub

Affected: 0.14.1.

https://github.com/befeleme/pyp2spec/security/advisories/GHSA-r35x-v8p8-xvhw
generic

Release v0.14.1 · befeleme/pyp2spec · GitHub

https://github.com/befeleme/pyp2spec/releases/tag/v0.14.1

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
pyp2spec0.1.0 ... 0.9.0 (21 versions)0.14.1—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 107 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-13 22:30 UTCEPSS rescore
  4. 2026-07-13 06:13 UTCEPSS rescore
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  12. 2026-07-06 02:23 UTCEPSS rescore
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  17. 2026-06-30 23:22 UTCEPSS rescore
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  20. 2026-06-28 04:56 UTCEPSS rescore
  21. 2026-06-28 03:45 UTCEG score recompute
  22. 2026-06-27 10:34 UTCEG score recompute
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  24. 2026-06-26 21:14 UTCEG score recompute
  25. 2026-06-25 13:49 UTCEPSS rescore
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  1. 2026-06-25 13:49 UTCEPSS rescore
  2. 2026-06-24 14:05 UTCEPSS rescore
  3. 2026-06-23 21:33 UTCEPSS rescore
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  6. 2026-06-21 14:56 UTCEPSS rescore
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  9. 2026-06-19 19:25 UTCEPSS rescore
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  13. 2026-06-17 01:16 UTCEG score recompute
  14. 2026-06-16 17:52 UTCEPSS rescore
  15. 2026-06-16 07:53 UTCEG score recompute
  16. 2026-06-15 17:49 UTCEPSS rescore
  17. 2026-06-15 03:48 UTCEG score recompute
  18. 2026-06-14 15:05 UTCEG score recompute
  19. 2026-06-14 02:22 UTCEG score recompute
  20. 2026-06-13 23:00 UTCEPSS rescore
  21. 2026-06-13 09:23 UTCEG score recompute
  22. 2026-06-12 23:12 UTCEPSS rescore
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  24. 2026-06-12 18:34 UTCEG score recompute
  25. 2026-06-12 01:50 UTCEG score recompute
  26. 2026-06-11 14:00 UTCEPSS rescore
  27. 2026-06-11 13:08 UTCEG score recompute
  28. 2026-06-11 00:23 UTCEG score recompute
  29. 2026-06-10 22:18 UTCEPSS rescore
  30. 2026-06-10 13:22 UTCEPSS rescore
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  32. 2026-06-10 11:24 UTCEG score recompute
  33. 2026-06-09 22:41 UTCEG score recompute
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  36. 2026-06-08 14:17 UTCEPSS rescore
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  38. 2026-06-08 04:56 UTCEG score recompute
  39. 2026-06-07 16:14 UTCEG score recompute
  40. 2026-06-07 15:25 UTCEPSS rescore
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  42. 2026-06-07 03:31 UTCEG score recompute
  43. 2026-06-06 14:48 UTCEG score recompute
  44. 2026-06-06 13:47 UTCEPSS rescore
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  46. 2026-06-06 02:04 UTCEG score recompute
  47. 2026-06-05 22:47 UTCEPSS rescore
  48. 2026-06-05 13:21 UTCEG score recompute
  49. 2026-06-05 00:36 UTCEG score recompute
  50. 2026-06-04 13:12 UTCEPSS rescore
  51. 2026-06-04 13:12 UTCEPSS rescore
  52. 2026-06-04 11:45 UTCEG score recompute
  53. 2026-06-03 23:02 UTCEG score recompute
  54. 2026-06-03 10:19 UTCEG score recompute
  55. 2026-06-02 21:36 UTCEG score recompute
  56. 2026-06-02 20:13 UTCEPSS rescore
  57. 2026-06-02 08:53 UTCEG score recompute
  58. 2026-06-01 20:10 UTCEG score recompute
  59. 2026-06-01 13:52 UTCEPSS rescore
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  61. 2026-06-01 07:27 UTCEG score recompute
  62. 2026-05-31 22:30 UTCEPSS rescore
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  64. 2026-05-31 00:16 UTCEPSS rescore
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  66. 2026-05-29 13:44 UTCEPSS rescore
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  68. 2026-05-28 13:44 UTCEPSS rescore
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  71. 2026-05-27 13:40 UTCEPSS rescore
  72. 2026-05-27 13:40 UTCEPSS rescore
  73. 2026-05-27 13:40 UTCEPSS rescore
  74. 2026-05-26 13:44 UTCEPSS rescore
  75. 2026-05-26 07:18 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42301?
CVE-2026-42301 is a high vulnerability published on May 9, 2026. 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,…
When was CVE-2026-42301 disclosed?
CVE-2026-42301 was first published in the National Vulnerability Database on May 9, 2026, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42301 actively exploited?
CVE-2026-42301 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42301?
CVE-2026-42301 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-42301?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42301, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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