CVE-2026-43637

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH 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: ghsa, secondary
Trending — 3 sources updated this week
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: —CVSS: 9.1Exploit: NoneExposed: 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(high)
EPSS
—
KEV
Not listed

Published

July 15, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Jul 15, 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 6× in last 7d / 6× 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. 2026-07-15 22:30 UTCEG score recompute
  2. 2026-07-15 22:30 UTCGHSA enrichment
  3. 2026-07-15 18:20 UTCEG score recompute
  4. 2026-07-15 18:20 UTCGHSA enrichment
  5. 2026-07-15 14:10 UTCEG score recompute
  6. 2026-07-15 14:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(4)

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.
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.

Dependency Blast Radius

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