CVE-2026-44722

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Source

https://cve.org/CVERecord?id=CVE-2026-44722

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44722.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-44722

Aliases

Downstream

Published

2026-07-17T16:42:01Z

Modified

2026-10-28T02:31:05Z

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

Summary

pyzipper: Encryption bypass for small files encrypted with pyzipper

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.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-480"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44722.json"
}

References

Affected packages

Git / github.com/danifus/pyzipper

Affected ranges

Type

GIT

Repo

https://github.com/danifus/pyzipper

Events

Introduced

Fixed

a814388f5a8a7b172ee2e2ca668fc33c7516e6bc

Fixed

93ce88e7dfd1635443197dab3fb8d477cff579ae

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.4.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "93ce88e7dfd1635443197dab3fb8d477cff579ae"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v0.4.0",
            "range": [
                {
                    "fixed": "a814388f5a8a7b172ee2e2ca668fc33c7516e6bc"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v0.*

v0.1.0

v0.2.0

v0.3.0

v0.3.1

v0.3.2

v0.3.3

v0.3.4

v0.3.5

v0.3.6

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44722.json"