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TI-2026-31739 Aliases CVE-2026-43637GHSA-rrh3-cwwj-g5mg

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

Priority MEDIUM 47CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00662 51st percentileScored 2026-11-07
Fix Fixed cornac (PreferredAI): 2.6.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PreferredAIcornacbefore 2.6.02.6.0Patch availableCNA
  • cornac VendorPreferredAI Affected before 2.6.0 Fixed in 2.6.0 Patch available CNA

Remediation

  • Fix · CNA cornac (PreferredAI) Fixed in 2.6.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-43637
  2. 2026-10-03 Alias added: GHSA-rrh3-cwwj-g5mg
  3. 2026-10-06 EPSS moved to the 50th–90th percentile

References

Patch 2

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences