What is CVE-2026-29509?

CVE-2026-29509 is a medium-severity vulnerability in Wummel Patool, classified under Path Traversal. CVSS score: 5.4/10. Published 2026-06-26.

How severe is CVE-2026-29509?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Path Traversal in Wummel Patool

CVE-2026-29509

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 charac…

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Wummel Patool — versions 0

Weakness classification (CWE)

CWE-22 — Path Traversal

References

disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-29509?: CVE-2026-29509 is a medium-severity vulnerability in Wummel Patool, classified under Path Traversal. CVSS score: 5.4/10. Published 2026-06-26.
How severe is CVE-2026-29509?: Medium severity. CVSS v3 base score is 5.4 out of 10.