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Tool Directory

CVE-2026-43637

HighPublished

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

Published: Jul 15, 2026
Updated: Jul 15, 2026
Assigning CNA: VulnCheck
Evidence observed: Aug 10, 2026

Primary CVSS

8.8/ 10High

nvd · CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS probability estimate

0.7%

Low · next 30 days

Percentile: 49.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

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.

Sources

CVE-2026-43637-cornacPoC
Path traversal (Tar Slip) in Cornac via _extract_archive (CVE-2026-43637)

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