CVE-2026-43637

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-15. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

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

Cornac before 2.6.0 contains a path traversal (Tar Slip) vulnerability that allows attackers to write arbitrary files outside the intended cache directory by supplying a crafted TAR archive containing ../ sequences, absolute paths, or symlink/hardlink entries to the _extract_archive() function in cornac/utils/download.py. Attackers can trigger this vulnerability through the built-in dataset loaders, which automatically download and extract archives, causing archive.extractall() to write files to arbitrary locations on the filesystem accessible to the running process.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
49%
KEV
Not listed

Published

July 15, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Aug 29, 2026
Patch available. Sources: github_commit, github_pr, github_release.
generic

Cornac < 2.6.0 Path Traversal via _extract_archive() in download.py | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cornac-path-traversal-via-extract-archive-in-download-py
github_release Patch Available

Cornac 2.6.0

Patch available: PreferredAI/cornac v2.6.0

https://github.com/PreferredAI/cornac/releases/tag/v2.6.0
github_pr Patch Available

Fix CWE-22 path traversal (Tar Slip) in dataset archive extraction

Patch available: PreferredAI/cornac v2.6.0 (PR #709 merged 2026-07-14)

https://github.com/PreferredAI/cornac/pull/709
github_commit Patch Available

commit 8a50be72c115 (PreferredAI/cornac)

Patch available: PreferredAI/cornac v2.6.0 (contains commit 8a50be72c115)

https://github.com/PreferredAI/cornac/commit/8a50be72c11569b6747c6b96d6e31a0a1962f1a8

Vendor Advisories for CVE-2026-43637(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 33× in last 7d / 206× 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 268 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43637?
CVE-2026-43637 is a critical vulnerability published on July 15, 2026. Cornac before 2.6.0 contains a path traversal (Tar Slip) vulnerability that allows attackers to write arbitrary files outside the intended cache directory by supplying a crafted TAR archive containing ../ sequences, absolute paths, or symlink/hardlink entries to the extractarchive() function in…
When was CVE-2026-43637 disclosed?
CVE-2026-43637 was first published in the National Vulnerability Database on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43637 actively exploited?
CVE-2026-43637 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 51.2% of all scored CVEs.
What is the CVSS score of CVE-2026-43637?
CVE-2026-43637 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-43637?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43637, 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.

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