{
  "cveId": "CVE-2026-84394",
  "url": "https://patchblox.com/security/cve/CVE-2026-84394",
  "summary": "CVE-2026-84394 is fixed in node-ajv on 1 platform by DEBIAN-CVE-2026-84394 (version 8.20.0~ds\u002B~cs7.1.5-1), released September 10, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "node-ajv: fast-uri accepts a host that contains an unbalanced or misplaced authority bracket without reporting an error",
  "description": "fast-uri accepts a host that contains an unbalanced or misplaced authority bracket without reporting an error. A host that starts with an opening bracket but does not end with a closing bracket is neither validated as an IP literal nor canonicalized as a domain name, so parse() returns it as the host with error undefined, while Node\u0027s URL and the HTTP clients built on it resolve the same string to a different host. An application that reads the parsed host to make a host decision, such as an SSRF denylist, a redirect allowlist, or proxy routing, and then passes the original URL to an HTTP client evaluates its policy against a string that is not the host the request reaches. The same host is carried through normalize, equal, and resolve. This affects fast-uri versions 2.4.5, 3.1.6, and 4.1.3, and is fixed in 2.4.6, 3.1.7, and 4.1.4, where parse() reports a malformed host for any host that contains a bracket but is not a valid IPv6 literal.",
  "published": "2026-09-03T05:16:38Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
  "epss": 0.0038,
  "epssPercentile": 0.32212,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "node-ajv",
      "release": "Debian 14",
      "fixedVersion": "8.20.0~ds\u002B~cs7.1.5-1",
      "fix": "DEBIAN-CVE-2026-84394",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-84394",
      "released": "2026-09-10T12:12:19Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}