patool: Patool before 4.0.5 contains a path traversal vulnerability in the safe_extract() function in patoolib/programs/py_ta...
CVE-2026-29509 is fixed in patool on 1 platform, first by DEBIAN-CVE-2026-29509, released June 28, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| patool · Debian 13.5 (trixie) | 4.0.0-1+deb13u1 | DEBIAN-CVE-2026-29509 | Jun 28, 2026 |
| patool · Debian 14 | 4.0.5-0.1 | DEBIAN-CVE-2026-29509 | Jun 28, 2026 |
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