CVE-2026-29509

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-06-26. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0

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

Patool before 4.0.5 contains a path traversal vulnerability in the safe_extract() function in patoolib/programs/py_tarfile.py when running on Python before 3.12, where the is_within_directory() helper uses os.path.commonprefix() for character-level string comparison instead of path-level comparison, allowing a crafted archive member path to bypass the containment check. Attackers can supply a malicious archive with specially crafted member paths to write arbitrary files.

CVSS v3
5.4
EG Score
5.4(high)
EPSS
20.4%
KEV
Not listed

Published

June 26, 2026

Last Modified

June 27, 2026

Advisory Details (3)

Auto-updated Jun 27, 2026
Patch available. Sources: github_release.
generic

Patool < 4.0.5 Path Traversal via safe_extract() Function | Advisories | VulnCheck

https://www.vulncheck.com/advisories/patool-path-traversal-via-safe-extract-function
github_release Patch Available

Release 4.0.5

Patch available: wummel/patool 4.0.5

https://github.com/wummel/patool/releases/tag/4.0.5
generic

patool/doc/changelog.txt at main · wummel/patool · GitHub

https://github.com/wummel/patool/blob/main/doc/changelog.txt

Vendor Advisories for CVE-2026-29509(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 34× 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.

  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 14:37 UTCEG score recompute
  4. 2026-07-06 14:37 UTCGHSA enrichment
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 12:44 UTCEG score recompute
  8. 2026-07-05 12:44 UTCGHSA enrichment
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 10:50 UTCEG score recompute
  11. 2026-07-04 10:50 UTCGHSA enrichment
  12. 2026-07-03 08:56 UTCEG score recompute
  13. 2026-07-03 08:56 UTCGHSA enrichment
  14. 2026-07-02 07:03 UTCEG score recompute
  15. 2026-07-02 07:02 UTCGHSA enrichment
  16. 2026-07-01 15:06 UTCEPSS rescore
  17. 2026-07-01 05:09 UTCEG score recompute
  18. 2026-07-01 05:09 UTCGHSA enrichment
  19. 2026-06-30 23:22 UTCEPSS rescore
  20. 2026-06-30 03:17 UTCEG score recompute
  21. 2026-06-30 03:16 UTCGHSA enrichment
  22. 2026-06-29 14:06 UTCEPSS rescore
  23. 2026-06-29 14:06 UTCEPSS rescore
  24. 2026-06-29 01:24 UTCEG score recompute
  25. 2026-06-29 01:24 UTCGHSA enrichment
Show 9 more
  1. 2026-06-28 14:07 UTCEPSS rescore
  2. 2026-06-28 14:07 UTCEPSS rescore
  3. 2026-06-28 04:56 UTCEPSS rescore
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-27 23:31 UTCEG score recompute
  6. 2026-06-27 23:31 UTCGHSA enrichment
  7. 2026-06-27 05:08 UTCNVD updateCVSS v4 → 5.3
  8. 2026-06-26 21:38 UTCEG score recompute
  9. 2026-06-26 21:38 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-29509?
CVE-2026-29509 is a medium vulnerability published on June 26, 2026. Patool before 4.0.5 contains a path traversal vulnerability in the safeextract() function in patoolib/programs/pytarfile.py when running on Python before 3.12, where the iswithindirectory() helper uses os.path.commonprefix() for character-level string comparison instead of path-level comparison,…
When was CVE-2026-29509 disclosed?
CVE-2026-29509 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on June 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-29509 actively exploited?
CVE-2026-29509 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-29509?
CVE-2026-29509 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-29509?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-29509, 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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