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CVE-2022-21221

Estado: ModificadaAlta (7.5)—

The package github.com/valyala/fasthttp before 1.34.0 are vulnerable to Directory Traversal via the ServeFile function, due to improper sanitization. It is possible to be exploited by using a backslash %5c character in the path. **Note:** This security issue impacts Windows users only.

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)

Fasthttp Project — Fasthttp

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2022-21221",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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        "impactScore": 2.9,
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        "obtainAllPrivilege": false,
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          "confidentialityImpact": "HIGH"
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          "vendor": "n/a",
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  "published": "2022-03-17T12:15:08.087",
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        "Third Party Advisory"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-22"
        }
      ]
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  "descriptions": [
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      "lang": "en",
      "value": "The package github.com/valyala/fasthttp before 1.34.0 are vulnerable to Directory Traversal via the ServeFile function, due to improper sanitization. It is possible to be exploited by using a backslash %5c character in the path. **Note:** This security issue impacts Windows users only."
    },
    {
      "lang": "es",
      "value": "El paquete github.com/valyala/fasthttp versiones anteriores a 1.34.0, es vulnerable a un Salto de Directorio por medio de la función ServeFile, debido a un saneo inapropiado. Puede explotarse usando un carácter de barra invertida %5c en la ruta. **Nota:** Este problema de seguridad afecta únicamente a usuarios de Windows"
    }
  ],
  "lastModified": "2026-06-17T04:25:46.757",
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}