CVE-2026-29509

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM 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
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: None knownExposed: 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(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

June 26, 2026

Last Modified

July 14, 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.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
patool4.0.0-1 ... 4.0.5-0.1 (7 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
patool4.0.0-1, 4.0.1-1, 4.0.2-1, 4.0.3-1, 4.0.4-14.0.5-0.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 57× 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 167 total refreshes for this CVE.

  1. 2026-09-11 14:52 UTCEPSS rescore
  2. 2026-09-10 09:34 UTCEPSS rescore
  3. 2026-09-08 22:00 UTCEPSS rescore
  4. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 14:59 UTCEG score recompute
  6. 2026-09-06 14:59 UTCGHSA enrichment
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-06 13:47 UTCEPSS rescore
  9. 2026-09-04 05:06 UTCEPSS rescore
  10. 2026-09-02 14:11 UTCEPSS rescore
  11. 2026-09-01 13:53 UTCEPSS rescore
  12. 2026-09-01 04:39 UTCEPSS rescore
  13. 2026-09-01 04:39 UTCEPSS rescore
  14. 2026-08-30 19:19 UTCEG score recompute
  15. 2026-08-30 19:19 UTCGHSA enrichment
  16. 2026-08-30 19:17 UTCEPSS rescore
  17. 2026-08-30 01:22 UTCEPSS rescore
  18. 2026-08-28 21:41 UTCEPSS rescore
  19. 2026-08-27 22:58 UTCEG score recompute
  20. 2026-08-27 22:58 UTCGHSA enrichment
  21. 2026-08-27 14:25 UTCEPSS rescore
  22. 2026-08-26 14:46 UTCEPSS rescore
  23. 2026-08-25 13:49 UTCEPSS rescore
  24. 2026-08-24 14:17 UTCEPSS rescore
  25. 2026-08-24 14:16 UTCEG score recompute
Show 75 more
  1. 2026-08-24 14:16 UTCGHSA enrichment
  2. 2026-08-23 12:20 UTCEG score recompute
  3. 2026-08-23 12:20 UTCGHSA enrichment
  4. 2026-08-23 00:19 UTCEPSS rescore
  5. 2026-08-22 10:28 UTCEG score recompute
  6. 2026-08-22 10:28 UTCGHSA enrichment
  7. 2026-08-21 23:49 UTCEPSS rescore
  8. 2026-08-21 08:35 UTCEG score recompute
  9. 2026-08-21 08:35 UTCGHSA enrichment
  10. 2026-08-20 22:55 UTCEPSS rescore
  11. 2026-08-20 22:55 UTCEPSS rescore
  12. 2026-08-20 06:42 UTCEG score recompute
  13. 2026-08-20 06:42 UTCGHSA enrichment
  14. 2026-08-19 17:03 UTCEPSS rescore
  15. 2026-08-18 23:41 UTCEG score recompute
  16. 2026-08-18 23:41 UTCGHSA enrichment
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-17 13:47 UTCEPSS rescore
  19. 2026-08-17 13:24 UTCEG score recompute
  20. 2026-08-17 13:24 UTCGHSA enrichment
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 11:32 UTCEG score recompute
  23. 2026-08-16 11:32 UTCGHSA enrichment
  24. 2026-08-16 02:14 UTCEPSS rescore
  25. 2026-08-15 09:40 UTCEG score recompute
  26. 2026-08-15 09:40 UTCGHSA enrichment
  27. 2026-08-15 01:30 UTCEPSS rescore
  28. 2026-08-14 07:47 UTCEG score recompute
  29. 2026-08-14 07:47 UTCGHSA enrichment
  30. 2026-08-13 22:00 UTCEPSS rescore
  31. 2026-08-13 05:55 UTCEG score recompute
  32. 2026-08-13 05:55 UTCGHSA enrichment
  33. 2026-08-12 13:50 UTCEPSS rescore
  34. 2026-08-12 04:02 UTCEG score recompute
  35. 2026-08-12 04:02 UTCGHSA enrichment
  36. 2026-08-11 13:42 UTCEPSS rescore
  37. 2026-08-11 02:09 UTCEG score recompute
  38. 2026-08-11 02:09 UTCGHSA enrichment
  39. 2026-08-11 00:00 UTCEPSS rescore
  40. 2026-08-10 00:16 UTCEG score recompute
  41. 2026-08-10 00:16 UTCGHSA enrichment
  42. 2026-08-09 13:46 UTCEPSS rescore
  43. 2026-08-08 22:24 UTCEG score recompute
  44. 2026-08-08 22:24 UTCGHSA enrichment
  45. 2026-08-08 16:37 UTCEPSS rescore
  46. 2026-08-07 20:31 UTCEG score recompute
  47. 2026-08-07 20:31 UTCGHSA enrichment
  48. 2026-08-06 18:39 UTCEG score recompute
  49. 2026-08-06 18:39 UTCGHSA enrichment
  50. 2026-08-06 13:46 UTCEPSS rescore
  51. 2026-08-05 19:17 UTCEPSS rescore
  52. 2026-08-05 16:47 UTCEG score recompute
  53. 2026-08-05 16:47 UTCGHSA enrichment
  54. 2026-08-04 15:10 UTCEPSS rescore
  55. 2026-08-04 14:52 UTCEG score recompute
  56. 2026-08-04 14:52 UTCGHSA enrichment
  57. 2026-08-03 10:36 UTCEPSS rescore
  58. 2026-08-03 07:51 UTCGHSA enrichment
  59. 2026-08-02 05:58 UTCEG score recompute
  60. 2026-08-02 05:58 UTCGHSA enrichment
  61. 2026-08-02 02:26 UTCEPSS rescore
  62. 2026-08-01 04:16 UTCEPSS rescore
  63. 2026-08-01 04:06 UTCGHSA enrichment
  64. 2026-07-31 02:09 UTCEG score recompute
  65. 2026-07-31 02:09 UTCGHSA enrichment
  66. 2026-07-30 16:27 UTCEPSS rescore
  67. 2026-07-30 01:30 UTCEPSS rescore
  68. 2026-07-30 00:14 UTCGHSA enrichment
  69. 2026-07-28 20:23 UTCEG score recompute
  70. 2026-07-28 20:23 UTCGHSA enrichment
  71. 2026-07-28 15:36 UTCEPSS rescore
  72. 2026-07-27 17:06 UTCEG score recompute
  73. 2026-07-27 17:06 UTCGHSA enrichment
  74. 2026-07-26 14:54 UTCEPSS rescore
  75. 2026-07-26 14:54 UTCEPSS rescore

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 July 14, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 69.5% of all scored CVEs.
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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