by Kastro
Paper/Archive/CVE-2026-43637

CVE-2026-43637

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

EPSS 0.7%CVSS 9.1
critical.is priorityof 100
38
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 51.7.517 × 2010.3No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
cornac< 2.6.02.6.0CNA

Scores by source

VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
VulnCheck (CNA)8.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/PreferredAI/cornac/releases/tag/v2.6.0refgithub.com/PreferredAI/cornac/pull/709patchgithub.com/PreferredAI/cornac/commit/8a50be72c11569b6747c6b96d6e31a0a1962f1a8writeupvulncheck.com/advisories/cornac-path-traversal-via-extract-archive-in-download-py