CVE-2026-21710 (GCVE-0-2026-21710)
Vulnerability from cvelistv5
Published
2026-03-30 19:07
Modified
2026-03-31 13:55
Summary
A flaw in Node.js HTTP request handling causes an uncaught `TypeError` when a request is received with a header named `__proto__` and the application accesses `req.headersDistinct`. When this occurs, `dest["__proto__"]` resolves to `Object.prototype` rather than `undefined`, causing `.push()` to be called on a non-array. This exception is thrown synchronously inside a property getter and cannot be intercepted by `error` event listeners, meaning it cannot be handled without wrapping every `req.headersDistinct` access in a `try/catch`. * This vulnerability affects all Node.js HTTP servers on **20.x, 22.x, 24.x, and v25.x**
Impacted products
Vendor Product Version
nodejs node Version: 20.20.1    20.20.1
Version: 22.22.1    22.22.1
Version: 24.14.0    24.14.0
Version: 25.8.1    25.8.1
Version: 4.0   
Version: 5.0   
Version: 6.0   
Version: 7.0   
Version: 8.0   
Version: 9.0   
Version: 10.0   
Version: 11.0   
Version: 12.0   
Version: 13.0   
Version: 14.0   
Version: 15.0   
Version: 16.0   
Version: 17.0   
Version: 18.0   
Version: 19.0   
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-21710",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-31T13:55:20.665443Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-31T13:55:23.719Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "node",
          "vendor": "nodejs",
          "versions": [
            {
              "lessThanOrEqual": "20.20.1",
              "status": "affected",
              "version": "20.20.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "22.22.1",
              "status": "affected",
              "version": "22.22.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "24.14.0",
              "status": "affected",
              "version": "24.14.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "25.8.1",
              "status": "affected",
              "version": "25.8.1",
              "versionType": "semver"
            },
            {
              "lessThan": "4.*",
              "status": "affected",
              "version": "4.0",
              "versionType": "semver"
            },
            {
              "lessThan": "5.*",
              "status": "affected",
              "version": "5.0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.*",
              "status": "affected",
              "version": "6.0",
              "versionType": "semver"
            },
            {
              "lessThan": "7.*",
              "status": "affected",
              "version": "7.0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.*",
              "status": "affected",
              "version": "8.0",
              "versionType": "semver"
            },
            {
              "lessThan": "9.*",
              "status": "affected",
              "version": "9.0",
              "versionType": "semver"
            },
            {
              "lessThan": "10.*",
              "status": "affected",
              "version": "10.0",
              "versionType": "semver"
            },
            {
              "lessThan": "11.*",
              "status": "affected",
              "version": "11.0",
              "versionType": "semver"
            },
            {
              "lessThan": "12.*",
              "status": "affected",
              "version": "12.0",
              "versionType": "semver"
            },
            {
              "lessThan": "13.*",
              "status": "affected",
              "version": "13.0",
              "versionType": "semver"
            },
            {
              "lessThan": "14.*",
              "status": "affected",
              "version": "14.0",
              "versionType": "semver"
            },
            {
              "lessThan": "15.*",
              "status": "affected",
              "version": "15.0",
              "versionType": "semver"
            },
            {
              "lessThan": "16.*",
              "status": "affected",
              "version": "16.0",
              "versionType": "semver"
            },
            {
              "lessThan": "17.*",
              "status": "affected",
              "version": "17.0",
              "versionType": "semver"
            },
            {
              "lessThan": "18.*",
              "status": "affected",
              "version": "18.0",
              "versionType": "semver"
            },
            {
              "lessThan": "19.*",
              "status": "affected",
              "version": "19.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw in Node.js HTTP request handling causes an uncaught `TypeError` when a request is received with a header named `__proto__` and the application accesses `req.headersDistinct`.\r\n\r\nWhen this occurs, `dest[\"__proto__\"]` resolves to `Object.prototype` rather than `undefined`, causing `.push()` to be called on a non-array. This exception is thrown synchronously inside a property getter and cannot be intercepted by `error` event listeners, meaning it cannot be handled without wrapping every `req.headersDistinct` access in a `try/catch`.\r\n\r\n* This vulnerability affects all Node.js HTTP servers on **20.x, 22.x, 24.x, and v25.x**"
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.0"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-30T19:07:28.558Z",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
      "references": [
        {
          "url": "https://nodejs.org/en/blog/vulnerability/march-2026-security-releases"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2026-21710",
    "datePublished": "2026-03-30T19:07:28.558Z",
    "dateReserved": "2026-01-04T15:00:06.574Z",
    "dateUpdated": "2026-03-31T13:55:23.719Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…