DEBIAN-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 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.
DEBIAN-CVE-2026-29509
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-29509
patool
Source reference: /affected/0/package/name
- Affected versions
- 4.0.0-1
Source reference:
/affected/0/versions - Fixed versions
- 4.0.0-1+deb13u1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
patool
Source reference: /affected/1/package/name
- Affected versions
- 4.0.0-1
Source reference:
/affected/1/versions4.0.1-1Source reference:
/affected/1/versions4.0.2-1Source reference:
/affected/1/versions4.0.3-1Source reference:
/affected/1/versions4.0.4-1Source reference:
/affected/1/versions - Fixed versions
- 4.0.5-0.1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.0.0-1+deb13u1"
}
]
}
],
"package": {
"name": "patool",
"purl": "pkg:deb/debian/patool?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"4.0.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-29509.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.0.5-0.1"
}
]
}
],
"package": {
"name": "patool",
"purl": "pkg:deb/debian/patool?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"4.0.0-1",
"4.0.1-1",
"4.0.2-1",
"4.0.3-1",
"4.0.4-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-29509.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56730 · Revision 1
- Added to Heist Feed
- Publisher date