Use of Incorrect Operator Affecting python-pyzipper package, versions <0.4.0-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN14-PYTHONPYZIPPER-18015596
- published19 Jul 2026
- disclosed17 Jul 2026
Introduced: 17 Jul 2026
CVE-2026-44722 (opens in a new tab)How to fix?
Upgrade Debian:14 python-pyzipper to version 0.4.0-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python-pyzipper package and not the python-pyzipper package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
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.