CVE-2026-44722

{
  "id": "CVE-2026-44722",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-17T17:17:15.240",
  "lastModified": "2026-10-24T20:10:00.137",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "pyzipper es un reemplazo para el módulo zipfile de Python que puede leer y escribir archivos zip cifrados con AES. Antes de la versión 0.4.0, un error de precedencia de operadores de Python en pyzipper/zipfile_aes.py hizo que el formato AE-2 nunca se seleccionara automáticamente durante el cifrado, lo que provocó que las entradas cifradas se escribieran en formato AE-1 y exponiendo la suma de verificación CRC32 en texto plano en la cabecera ZIP y, para archivos zip no buscables, en la sección del descriptor de datos, permitiendo a un atacante que posee el archivo forzar por fuerza bruta posibles textos planos para archivos pequeños o de baja entropía comparando los valores CRC32. Este problema está corregido en la versión 0.4.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "danifus",
          "product": "pyzipper",
          "versions": [
            {
              "version": "< 0.4.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "baseScore": 6.2,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-17T17:25:00.965188Z",
          "id": "CVE-2026-44722",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-480"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/danifus/pyzipper/commit/93ce88e7dfd1635443197dab3fb8d477cff579ae",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/danifus/pyzipper/releases/tag/v0.4.0",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/danifus/pyzipper/security/advisories/GHSA-crqm-m339-7m2p",
      "source": "[email protected]"
    }
  ]
}