CVE-2026-43637

CRITICALPre-NVD 9.19.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
9.1CRITICALmedium confidence
EG Risk
56
EG Risk 56/100

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 (value × EchelonGraph’s weight)
Severity91% × 45%
The EG Score, 9.1 of 10.
Exploitation0.7% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 15, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Sep 16, 2026
Patch available. Sources: github_commit, github_pr, github_release.
Web page

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 pull request 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 16× in last 7d / 45× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 354 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 254 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 02:10 UTCEG score recompute
  2. 2026-10-14 02:10 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  3. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  4. 2026-10-12 22:31 UTCEG score recompute
  5. 2026-10-12 22:30 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  6. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  7. 2026-10-12 16:06 UTCEG score recompute
  8. 2026-10-12 07:53 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  9. 2026-10-11 19:48 UTCEG score recompute
  10. 2026-10-11 17:02 UTCEG score recompute
  11. 2026-10-11 14:28 UTCEG score recompute
  12. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  13. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  14. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  15. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  16. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  17. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  19. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  20. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  21. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  22. 2026-10-01 12:41 UTCEG score recompute
  23. 2026-10-01 12:41 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  24. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  25. 2026-09-28 13:14 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
Show 75 more
  1. 2026-09-28 08:46 UTCEG score recompute
  2. 2026-09-28 08:46 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  3. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  4. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  5. 2026-09-24 13:18 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  6. 2026-09-24 08:53 UTCEG score recompute
  7. 2026-09-24 08:53 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  8. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  9. 2026-09-23 11:41 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  10. 2026-09-23 07:29 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  11. 2026-09-23 03:19 UTCEG score recompute
  12. 2026-09-23 03:19 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  13. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  14. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  15. 2026-09-18 09:59 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  16. 2026-09-18 04:46 UTCEG score recompute
  17. 2026-09-18 04:46 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  18. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  19. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  20. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  21. 2026-09-14 11:42 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  22. 2026-09-14 07:32 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  23. 2026-09-14 03:23 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  24. 2026-09-13 23:13 UTCEG score recompute
  25. 2026-09-13 23:13 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  26. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  27. 2026-09-13 16:25 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  28. 2026-09-13 11:49 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  29. 2026-09-13 07:16 UTCEG score recompute
  30. 2026-09-13 07:16 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  31. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  32. 2026-09-12 13:03 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  33. 2026-09-12 07:26 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  34. 2026-09-12 01:56 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  35. 2026-09-11 21:46 UTCEG score recompute
  36. 2026-09-11 21:46 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  37. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  38. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  39. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  40. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  41. 2026-09-08 00:56 UTCEG score recompute
  42. 2026-09-08 00:56 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  43. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  44. 2026-09-06 17:44 UTCEG score recompute
  45. 2026-09-06 17:44 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  46. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  47. 2026-09-06 13:29 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  48. 2026-09-06 01:30 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  49. 2026-09-05 20:51 UTCEG score recompute
  50. 2026-09-05 20:51 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  51. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  52. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  53. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  54. 2026-08-31 05:39 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  55. 2026-08-31 01:29 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  56. 2026-08-30 21:19 UTCEG score recompute
  57. 2026-08-30 21:19 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  58. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  59. 2026-08-30 17:09 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  60. 2026-08-30 12:59 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  61. 2026-08-30 08:14 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  62. 2026-08-30 03:53 UTCEG score recompute
  63. 2026-08-30 03:53 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  64. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  65. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  66. 2026-08-28 01:52 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  67. 2026-08-27 21:28 UTCEG score recompute
  68. 2026-08-27 21:28 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  69. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  70. 2026-08-27 12:44 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  71. 2026-08-27 03:38 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  72. 2026-08-26 23:09 UTCEG score recompute
  73. 2026-08-26 23:09 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1
  74. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  75. 2026-08-26 12:01 UTCGHSA enrichmentGHSA-rrh3-cwwj-g5mg · GitHub severity HIGH · GitHub CVSS 9.1

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43637?
CVE-2026-43637 is a critical-severity vulnerability; its CVE record was 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 made public?
CVE-2026-43637 was made public on July 11, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on July 15, 2026. EchelonGraph's copy of the record carries a last-modified date of July 15, 2026; the record at its source may have been updated since.
Is CVE-2026-43637 actively exploited?
CVE-2026-43637 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43637?
CVE-2026-43637 has a CVSS base score of 9.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-43637?
A fix for CVE-2026-43637 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-43637 are linked in the Vendor Advisories panel on this page.

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