DEBIAN-CVE-2026-44722
pyzipper is a replacement for Python's zipfile that can read and write AES encrypted zip files. Prior to 0.4.0, a Python operator precedence bug in pyzipper/zipfile_aes.py caused the AE-2 format to never be automatically selected during encryption, causing encrypted entries to be written in AE-1 format and exposing the plaintext CRC32 checksum in the ZIP header and, for unseekable zip archives, in the datadescripter section, allowing an attacker who possesses the archive to brute-force candidate plaintexts for small or low-entropy files by comparing CRC32 values. This issue is fixed in version 0.4.0.
DEBIAN-CVE-2026-44722
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-2026-44722
python-pyzipper
Source reference: /affected/0/package/name
- Affected versions
- 0.3.6-5
Source reference:
/affected/0/versions0.4.0-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
python-pyzipper
Source reference: /affected/1/package/name
- Affected versions
- 0.3.6-5
Source reference:
/affected/1/versions - Fixed versions
- 0.4.0-1
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"
}
]
}
],
"package": {
"name": "python-pyzipper",
"purl": "pkg:deb/debian/python-pyzipper?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.3.6-5",
"0.4.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44722.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.4.0-1"
}
]
}
],
"package": {
"name": "python-pyzipper",
"purl": "pkg:deb/debian/python-pyzipper?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.3.6-5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44722.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57707 · Revision 1
- Added to Heist Feed
- Publisher date