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CVE-2026-44722

MEDIUM
6.2
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-44722
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-07 18:04 UTC
Published
2026-07-17 16:42 UTC
Last updated
2026-07-17 17:25 UTC
Primary CWE
CWE-480
CWE-480: Use of Incorrect Operator
Vendor / Product
danifus / pyzipper
Sources
cve.org  ·  NVD

Severity & Metrics

6.2 MEDIUM CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
danifus pyzipper — < 0.4.0
Weakness (CWE)
CWESourceDescription
CWE-480 cna CWE-480: Use of Incorrect Operator
CVSS scores (1)
ScoreSeverityVersionSourceVector
6.2 MEDIUM 3.1 cna CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References (3)
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