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CVE-2026-21710

🗓️ 30 Mar 2026 19:07:28Reported by hackeroneType 
cve
 cve
🔗 web.nvd.nist.gov👁 163 Views🌐 WEB

CVE-2026-21710: Uncaught TypeError in Node.js HTTP when header __proto__ interacts with req.headersDistinct; affects 20.x, 22.x, 24.x, and v25.x.

Related
Detection
Affected
Refs
Paths
NVD
Vulners
Node
OR
nodejsnode.jsRange≤20.20.1-
nodejsnode.jsRange22.0.0–22.22.1-
nodejsnode.jsRange24.0.0–24.14.0-
nodejsnode.jsRange25.0.0–25.8.1-
[
  {
    "defaultStatus": "unaffected",
    "vendor": "nodejs",
    "product": "node",
    "versions": [
      {
        "version": "20.20.1",
        "status": "affected",
        "lessThanOrEqual": "20.20.1",
        "versionType": "semver"
      },
      {
        "version": "22.22.1",
        "status": "affected",
        "lessThanOrEqual": "22.22.1",
        "versionType": "semver"
      },
      {
        "version": "24.14.0",
        "status": "affected",
        "lessThanOrEqual": "24.14.0",
        "versionType": "semver"
      },
      {
        "version": "25.8.1",
        "status": "affected",
        "lessThanOrEqual": "25.8.1",
        "versionType": "semver"
      },
      {
        "version": "4.0",
        "status": "affected",
        "lessThan": "4.*",
        "versionType": "semver"
      },
      {
        "version": "5.0",
        "status": "affected",
        "lessThan": "5.*",
        "versionType": "semver"
      },
      {
        "version": "6.0",
        "status": "affected",
        "lessThan": "6.*",
        "versionType": "semver"
      },
      {
        "version": "7.0",
        "status": "affected",
        "lessThan": "7.*",
        "versionType": "semver"
      },
      {
        "version": "8.0",
        "status": "affected",
        "lessThan": "8.*",
        "versionType": "semver"
      },
      {
        "version": "9.0",
        "status": "affected",
        "lessThan": "9.*",
        "versionType": "semver"
      },
      {
        "version": "10.0",
        "status": "affected",
        "lessThan": "10.*",
        "versionType": "semver"
      },
      {
        "version": "11.0",
        "status": "affected",
        "lessThan": "11.*",
        "versionType": "semver"
      },
      {
        "version": "12.0",
        "status": "affected",
        "lessThan": "12.*",
        "versionType": "semver"
      },
      {
        "version": "13.0",
        "status": "affected",
        "lessThan": "13.*",
        "versionType": "semver"
      },
      {
        "version": "14.0",
        "status": "affected",
        "lessThan": "14.*",
        "versionType": "semver"
      },
      {
        "version": "15.0",
        "status": "affected",
        "lessThan": "15.*",
        "versionType": "semver"
      },
      {
        "version": "16.0",
        "status": "affected",
        "lessThan": "16.*",
        "versionType": "semver"
      },
      {
        "version": "17.0",
        "status": "affected",
        "lessThan": "17.*",
        "versionType": "semver"
      },
      {
        "version": "18.0",
        "status": "affected",
        "lessThan": "18.*",
        "versionType": "semver"
      },
      {
        "version": "19.0",
        "status": "affected",
        "lessThan": "19.*",
        "versionType": "semver"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
__proto__header/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`.CWE-770, CWE-843

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19 Aug 2026 14:32Current
7.4High risk
Vulners AI Score7.4
CVSS 37.5
CVSS 3.17.5
EPSS0.25044
SSVC
163