{
  "cvss": 3.7,
  "datePublished": "2026-08-04T01:16:20.247",
  "dateUpdated": "2026-10-23T23:10:00.157",
  "description": "A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from the visible `IncomingMessage` headers while piping the original body to a reused backend connection.\r\n\r\nNode.js can omit headers beyond `maxHeadersCount` / `maxHeaderPairs` from `req.headers`, `req.rawHeaders`, and `req.headersDistinct`, while still using those omitted headers internally for HTTP message framing. In particular, `Content-Length` can be hidden from userland while the request body is still delivered.\r\n\r\nThis vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.",
  "id": "CVE-2026-58044",
  "raw": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "unaffected",
            "product": "node",
            "vendor": "nodejs",
            "versions": [
              {
                "lessThanOrEqual": "26.5.0",
                "status": "affected",
                "version": "26.5.0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "24.18.0",
                "status": "affected",
                "version": "24.18.0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "22.23.1",
                "status": "affected",
                "version": "22.23.1",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "support@hackerone.com"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from the visible `IncomingMessage` headers while piping the original body to a reused backend connection.\r\n\r\nNode.js can omit headers beyond `maxHeadersCount` / `maxHeaderPairs` from `req.headers`, `req.rawHeaders`, and `req.headersDistinct`, while still using those omitted headers internally for HTTP message framing. In particular, `Content-Length` can be hidden from userland while the request body is still delivered.\r\n\r\nThis vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**."
      },
      {
        "lang": "es",
        "value": "Una falla en el cliente HTTP de Node.js puede causar una desincronización de solicitudes para proxies de reenvío basados en Node.js que reconstruyen los encabezados salientes a partir de los encabezados visibles de ’IncomingMessage’ mientras canalizan el cuerpo original a una conexión de backend reutilizada.\n\nNode.js puede omitir encabezados más allá de ’maxHeadersCount’ / ’maxHeaderPairs’ de ’req.headers’, ’req.rawHeaders’ y ’req.headersDistinct’, mientras sigue utilizando esos encabezados omitidos internamente para el encuadre de mensajes HTTP. En particular, ’Content-Length’ puede ocultarse de userland mientras el cuerpo de la solicitud aún se entrega.\n\nEsta vulnerabilidad afecta a todas las líneas de lanzamiento compatibles: Node.js 22, Node.js 24 y Node.js 26."
      }
    ],
    "id": "CVE-2026-58044",
    "lastModified": "2026-10-23T23:10:00.157",
    "metrics": {
      "cvssMetricV30": [
        {
          "cvssData": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.0"
          },
          "exploitabilityScore": 2.2,
          "impactScore": 1.4,
          "source": "support@hackerone.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-58044",
            "options": [
              {
                "exploitation": "none"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "partial"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-04T14:19:38.226326Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-04T01:16:20.247",
    "references": [
      {
        "source": "support@hackerone.com",
        "url": "https://nodejs.org/en/blog/vulnerability/july-2026-security-releases"
      }
    ],
    "sourceIdentifier": "support@hackerone.com",
    "vulnStatus": "Awaiting Analysis",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-444"
          }
        ],
        "source": "support@hackerone.com",
        "type": "Secondary"
      }
    ]
  },
  "severity": "LOW",
  "source": "nvd",
  "title": "A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild..."
}