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CVE-2022-44900

Estado: ModificadaCrítica (9.1)—💥 PoC

Una vulnerabilidad de directory traversal en la función SevenZipFile.extractall() de la librería de Python py7zr v0.20.0 y versiones anteriores permite a los atacantes escribir archivos arbitrarios extrayendo un archivo 7z manipulado.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (1)

Py7zr Project — Py7zr

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2022-44900",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "id": "CVE-2022-44900",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-04-23T14:31:44.778950Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "source": "nvd@nist.gov",
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          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 3.9
      },
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          "integrityImpact": "HIGH",
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          "availabilityImpact": "NONE",
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          "confidentialityImpact": "HIGH"
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  "affected": [
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  "published": "2022-12-06T20:15:10.560",
  "references": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
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      ]
    },
    {
      "type": "Secondary",
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A directory traversal vulnerability in the SevenZipFile.extractall() function of the python library py7zr v0.20.0 and earlier allows attackers to write arbitrary files via extracting a crafted 7z file."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de directory traversal en la función SevenZipFile.extractall() de la librería de Python py7zr v0.20.0 y versiones anteriores permite a los atacantes escribir archivos arbitrarios extrayendo un archivo 7z manipulado."
    }
  ],
  "lastModified": "2026-06-17T05:09:01.750",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
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              "versionEndExcluding": "0.20.1"
            }
          ],
          "operator": "OR"
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  "sourceIdentifier": "cve@mitre.org"
}