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CVE-2025-23167

Estado: AplazadaMedia (6.5)—

A flaw in Node.js 20's HTTP parser allows improper termination of HTTP/1 headers using `\r\n\rX` instead of the required `\r\n\r\n`. This inconsistency enables request smuggling, allowing attackers to bypass proxy-based access controls and submit unauthorized requests.

The issue was resolved by upgrading `llhttp` to version 9, which enforces correct header termination.

Impact: * This vulnerability affects only Node.js 20.x users prior to the `llhttp` v9 upgrade.

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 (2)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Llhttp — LlhttpAINodejs — NodejsAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-23167",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-23167",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-05-19T15:09:55.841520Z"
        }
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Secondary",
        "source": "support@hackerone.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.5,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "support@hackerone.com",
      "affectedData": [
        {
          "vendor": "nodejs",
          "product": "node",
          "versions": [
            {
              "status": "affected",
              "version": "4.0",
              "lessThan": "4.*",
              "versionType": "semver"
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            {
              "status": "affected",
              "version": "5.0",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "status": "affected",
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              "versionType": "semver"
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            {
              "status": "affected",
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              "status": "affected",
              "version": "14.0",
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            },
            {
              "status": "affected",
              "version": "15.0",
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            },
            {
              "status": "affected",
              "version": "16.0",
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            {
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              "version": "20.0",
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              "lessThanOrEqual": "20.19.1"
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          "defaultStatus": "unaffected"
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  ],
  "published": "2025-05-19T02:15:17.583",
  "references": [
    {
      "url": "https://nodejs.org/en/blog/vulnerability/may-2025-security-releases",
      "source": "support@hackerone.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw in Node.js 20's HTTP parser allows improper termination of HTTP/1 headers using `\\r\\n\\rX` instead of the required `\\r\\n\\r\\n`.\nThis inconsistency enables request smuggling, allowing attackers to bypass proxy-based access controls and submit unauthorized requests.\n\nThe issue was resolved by upgrading `llhttp` to version 9, which enforces correct header termination.\n\nImpact:\n* This vulnerability affects only Node.js 20.x users prior to the `llhttp` v9 upgrade."
    },
    {
      "lang": "es",
      "value": "Una falla en el analizador HTTP de Node.js 20 permite la terminación incorrecta de los encabezados HTTP/1 mediante `\\r\\n\\rX` en lugar del `\\r\\n\\r\\n` requerido. Esta inconsistencia facilita el contrabando de solicitudes, lo que permite a los atacantes eludir los controles de acceso basados en proxy y enviar solicitudes no autorizadas. El problema se solucionó actualizando `llhttp` a la versión 9, que aplica la terminación correcta de los encabezados. Impacto: * Esta vulnerabilidad afecta solo a los usuarios de Node.js 20.x anteriores a la actualización a `llhttp` v9."
    }
  ],
  "lastModified": "2026-06-17T08:52:18.947",
  "sourceIdentifier": "support@hackerone.com"
}