Vulnerabilities in pkg:npm/@hono/node-server

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-9mqv-5hh9-4cgg",
  "modified" : "2026-08-13T17:37:34Z",
  "published" : "2026-07-21T22:04:27Z",
  "aliases" : [ "CVE-2026-73565" ],
  "summary" : "Node.js Adapter for Hono: Unauthenticated memory-leak DoS via aborted WebSocket handshake",
  "details" : "## Summary\n\nA WebSocket upgrade request to an `upgradeWebSocket` route with a missing or malformed `Sec-WebSocket-Key` header leaks memory permanently. The request's `IncomingMessage` is retained in an internal map and a pending promise is never settled, even though no connection is established. Since the route is reachable pre-handshake without authentication, an unauthenticated attacker can flood it to gradually exhaust memory.\n\n## Details\n\nThe built-in WebSocket helper cleans up its internal map only on a successful handshake or when the route guard rejects the request. When `ws` aborts the handshake because `Sec-WebSocket-Key` is missing or malformed, no `connection` event is emitted, so neither cleanup path runs and the entry is retained forever. A present-but-malformed key leaks identically, so a proxy that only checks for the header's presence does not mitigate it.\n\n## Impact\n\nAn unauthenticated attacker can flood any public `upgradeWebSocket` route with malformed-key upgrade requests, causing unbounded memory growth and eventual loss of availability. No confidentiality or integrity impact.\n\nReported by @TarPeg007.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@hono/node-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.0.10"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.0.9"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/honojs/node-server/security/advisories/GHSA-9mqv-5hh9-4cgg"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/honojs/node-server/commit/3a21938c418340e980cb7ffa88e78369f78392d1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/honojs/node-server"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/honojs/node-server/releases/tag/v2.0.10"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-401", "CWE-770" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-21T22:04:27Z",
    "nvd_published_at" : null
  }
}