FKIE_CVE-2026-1527

Vulnerability from fkie_nvd - Published: 2026-03-12 21:16 - Updated: 2026-06-17 10:16
Severity
4.6 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Summary
ImpactWhen an application passes user-controlled input to the upgrade option of client.request(), an attacker can inject CRLF sequences (\r\n) to: * Inject arbitrary HTTP headers * Terminate the HTTP request prematurely and smuggle raw data to non-HTTP services (Redis, Memcached, Elasticsearch) The vulnerability exists because undici writes the upgrade value directly to the socket without validating for invalid header characters: // lib/dispatcher/client-h1.js:1121 if (upgrade) { header += `connection: upgrade\r\nupgrade: ${upgrade}\r\n` }
References
ce714d77-add3-4f53-aff5-83d477b104bbhttps://cna.openjsf.org/security-advisories.htmlVendor Advisory
ce714d77-add3-4f53-aff5-83d477b104bbhttps://github.com/nodejs/undici/security/advisories/GHSA-4992-7rv2-5pvqMitigation, Patch, Vendor Advisory
ce714d77-add3-4f53-aff5-83d477b104bbhttps://hackerone.com/reports/3487198Permissions Required
Impacted products
Vendor Product Version
nodejs undici *
nodejs undici *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://github.com/nodejs/undici/",
          "defaultStatus": "unaffected",
          "packageName": "undici",
          "product": "undici",
          "repo": "https://github.com/nodejs/undici/",
          "vendor": "undici",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.24.0; 7.0.0 \u003c 7.24.0"
            },
            {
              "status": "unaffected",
              "version": "6.24.0: 7.24.0"
            }
          ]
        }
      ],
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "C08CE582-019D-4A06-910A-6010C2D6EF4F",
              "versionEndExcluding": "6.24.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "F016E7D9-C45A-4DEF-9AD8-F0581AF5E509",
              "versionEndExcluding": "7.24.0",
              "versionStartIncluding": "7.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ImpactWhen an application passes user-controlled input to the\u00a0upgrade\u00a0option of\u00a0client.request(), an attacker can inject CRLF sequences (\\r\\n) to:\n\n  *  Inject arbitrary HTTP headers\n  *  Terminate the HTTP request prematurely and smuggle raw data to non-HTTP services (Redis, Memcached, Elasticsearch)\nThe vulnerability exists because undici writes the\u00a0upgrade\u00a0value directly to the socket without validating for invalid header characters:\n\n// lib/dispatcher/client-h1.js:1121\nif (upgrade) {\n  header += `connection: upgrade\\r\\nupgrade: ${upgrade}\\r\\n`\n}"
    },
    {
      "lang": "es",
      "value": "ImpactoCuando una aplicaci\u00f3n pasa entrada controlada por el usuario a la opci\u00f3n upgrade de client.request(), un atacante puede inyectar secuencias CRLF (\\r\\n) para:\n\n  *  Inyectar encabezados HTTP arbitrarios\n  *  Terminar la solicitud HTTP prematuramente y contrabandear datos sin procesar a servicios no HTTP (Redis, Memcached, Elasticsearch)\nLa vulnerabilidad existe porque undici escribe el valor upgrade directamente al socket sin validar caracteres de encabezado no v\u00e1lidos:\n\n// lib/dispatcher/client-h1.js:1121\nif (upgrade) {\n  header += `connection: upgrade\\r\\nupgrade: ${upgrade}\\r\\n`\n}"
    }
  ],
  "id": "CVE-2026-1527",
  "lastModified": "2026-06-17T10:16:00.187",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.6,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 2.5,
        "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-1527",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-13T18:05:24.550959Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-12T21:16:25.137",
  "references": [
    {
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://cna.openjsf.org/security-advisories.html"
    },
    {
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
      "tags": [
        "Mitigation",
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/nodejs/undici/security/advisories/GHSA-4992-7rv2-5pvq"
    },
    {
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
      "tags": [
        "Permissions Required"
      ],
      "url": "https://hackerone.com/reports/3487198"
    }
  ],
  "sourceIdentifier": "ce714d77-add3-4f53-aff5-83d477b104bb",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-93"
        }
      ],
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
      "type": "Secondary"
    }
  ]
}



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