UBUNTU-CVE-2026-44722

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Source
https://ubuntu.com/security/CVE-2026-44722
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44722.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-44722
Upstream
Published
2026-07-17T17:17:00Z
Modified
2026-07-29T10:18:12Z
Severity
  • 6.2 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:26.04:LTS / python-pyzipper

Package

Name
python-pyzipper
Purl
pkg:deb/ubuntu/python-pyzipper?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.3.6-5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-pyzipper",
            "binary_version": "0.3.6-5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44722.json"