{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.4.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "93ce88e7dfd1635443197dab3fb8d477cff579ae"
            },
            {
              "fixed": "a814388f5a8a7b172ee2e2ca668fc33c7516e6bc"
            }
          ],
          "repo": "https://github.com/danifus/pyzipper",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-crqm-m339-7m2p"
  ],
  "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"
  },
  "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.",
  "id": "CVE-2026-44722",
  "modified": "2026-07-19T03:31:05.887819042Z",
  "published": "2026-07-17T16:42:01.472Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/danifus/pyzipper/releases/tag/v0.4.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44722.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/danifus/pyzipper/security/advisories/GHSA-crqm-m339-7m2p"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44722"
    },
    {
      "type": "FIX",
      "url": "https://github.com/danifus/pyzipper/commit/93ce88e7dfd1635443197dab3fb8d477cff579ae"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "pyzipper: Encryption bypass for small files encrypted with pyzipper"
}