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CVE-2026-44788

Estado: AnalizadaMedia (6.5)—

SharpCompress is a fully managed C# library to deal with many compression types and formats. In 0.47.4 and earlier, a path traversal vulnerability in IArchive.WriteToDirectory() allows a malicious archive to create directories outside the intended extraction root. For TAR archives, this can be escalated to arbitrary file writes by chaining with a symlink entry, giving a full write primitive on the target filesystem subject to the permissions of the running process.

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).

Tecnologías afectadas (1)

Adamhathcock — Sharpcompress

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-44788",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-44788",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-27T12:46:10.326841Z"
        }
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    ],
    "cvssMetricV31": [
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          "version": "3.1",
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4.2,
        "exploitabilityScore": 1.6
      },
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        "source": "nvd@nist.gov",
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  "published": "2026-05-26T22:16:42.587",
  "references": [
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      "url": "https://github.com/adamhathcock/sharpcompress/security/advisories/GHSA-6c8g-7p36-r338",
      "tags": [
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        "Vendor Advisory"
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
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    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "SharpCompress is a fully managed C# library to deal with many compression types and formats. In 0.47.4 and earlier, a path traversal vulnerability in IArchive.WriteToDirectory() allows a malicious archive to create directories outside the intended extraction root. For TAR archives, this can be escalated to arbitrary file writes by chaining with a symlink entry, giving a full write primitive on the target filesystem subject to the permissions of the running process."
    },
    {
      "lang": "es",
      "value": "SharpCompress es una biblioteca C# totalmente gestionada para manejar muchos tipos y formatos de compresión. En 0.47.4 y versiones anteriores, una vulnerabilidad de salto de ruta en IArchive.WriteToDirectory() permite que un archivo malicioso cree directorios fuera de la raíz de extracción prevista. Para archivos TAR, esto puede escalarse a escrituras de archivos arbitrarias encadenando con una entrada de enlace simbólico, otorgando una primitiva de escritura completa en el sistema de archivos de destino sujeta a los permisos del proceso en ejecución."
    }
  ],
  "lastModified": "2026-07-24T11:10:00.170",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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}