Patool < 4.0.5 Path Traversal via safe_extract() Function_CVE-2026-29509

5.3 / 10

MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Description

Patool before 4.0.5 contains a path traversal vulnerability in the safe_extract() function in patoolib/programs/py_tarfile.py when running on Python before 3.12, where the is_within_directory() helper uses os.path.commonprefix() for character-level string comparison instead of path-level comparison, allowing a crafted archive member path to bypass the containment check. Attackers can supply a malicious archive with specially crafted member paths to write arbitrary files.

Basic Information

ID CVE-2026-29509

Source VulnCheck

Published Jun 26, 2026 at 19:31

Affected Product

Vendor wummel

Product patool

Affected Versions wummel patool 0

CWE Classification

CWE-22

References

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    "published": "2026-06-26T19:31:07.165Z",
    "modified": "2026-06-26T19:31:07.165Z",
    "type": "cve",
    "title": "Patool < 4.0.5 Path Traversal via safe_extract() Function",
    "source": "VulnCheck",
    "references": "https://github.com/wummel/patool/releases/tag/4.0.5\nhttps://github.com/wummel/patool/blob/main/doc/changelog.txt\nhttps://www.vulncheck.com/advisories/patool-path-traversal-via-safe-extract-function",
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