FKIE_CVE-2026-45302

Vulnerability from fkie_nvd - Published: 2026-06-01 19:16 - Updated: 2026-07-22 08:10
Severity
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Summary
parse-nested-form-data is a tiny node module for parsing FormData by name into objects and arrays. Prior to version 1.0.1, parseFormData() walks bracket and dot-notation FormData field names into nested objects without filtering reserved property keys. A single FormData field whose name begins with __proto__, or contains .__proto__. mid-path, causes the parser to traverse onto Object.prototype and assign properties there, polluting the prototype chain of every plain object in the running process. This issue has been patched in version 1.0.1.
References
security-advisories@github.comhttps://github.com/milamer/parse-nested-form-data/commit/527ad58eb486e32438f7198fb88315c20449d792
security-advisories@github.comhttps://github.com/milamer/parse-nested-form-data/releases/tag/v1.0.1
security-advisories@github.comhttps://github.com/milamer/parse-nested-form-data/security/advisories/GHSA-xp7r-j8r6-j9h3
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/milamer/parse-nested-form-data/security/advisories/GHSA-xp7r-j8r6-j9h3
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "parse-nested-form-data",
          "vendor": "milamer",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.0.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "parse-nested-form-data is a tiny node module for parsing FormData by name into objects and arrays. Prior to version 1.0.1, parseFormData() walks bracket and dot-notation FormData field names into nested objects without filtering reserved property keys. A single FormData field whose name begins with __proto__, or contains .__proto__. mid-path, causes the parser to traverse onto Object.prototype and assign properties there, polluting the prototype chain of every plain object in the running process. This issue has been patched in version 1.0.1."
    },
    {
      "lang": "es",
      "value": "parse-nested-form-data es un peque\u00f1o m\u00f3dulo de Node para analizar datos de FormData por nombre en objetos y arrays. Antes de la versi\u00f3n 1.0.1, parseFormData() recorre los nombres de campo de FormData con notaci\u00f3n de corchetes y de puntos en objetos anidados sin filtrar las claves de propiedades reservadas. Un \u00fanico campo de FormData cuyo nombre comienza con __proto__, o contiene .__proto__. a mitad de ruta, hace que el analizador recorra Object.prototype y asigne propiedades all\u00ed, contaminando la cadena de prototipos de cada objeto plano en el proceso en ejecuci\u00f3n. Este problema ha sido parcheado en la versi\u00f3n 1.0.1."
    }
  ],
  "id": "CVE-2026-45302",
  "lastModified": "2026-07-22T08:10:00.117",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-45302",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-02T14:44:56.480694Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-01T19:16:51.113",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/milamer/parse-nested-form-data/commit/527ad58eb486e32438f7198fb88315c20449d792"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/milamer/parse-nested-form-data/releases/tag/v1.0.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/milamer/parse-nested-form-data/security/advisories/GHSA-xp7r-j8r6-j9h3"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/milamer/parse-nested-form-data/security/advisories/GHSA-xp7r-j8r6-j9h3"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1321"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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