{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.0.0"
              },
              {
                "fixed": "2.0.10"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "58c9355998b3b202bf7eb22b1505a2d4d847c3b0"
            },
            {
              "fixed": "3a21938c418340e980cb7ffa88e78369f78392d1"
            },
            {
              "fixed": "7c1457ed5536c02fdd2f001129fae67bcbca54a1"
            }
          ],
          "repo": "https://github.com/honojs/node-server",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9mqv-5hh9-4cgg"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-401",
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73565.json"
  },
  "details": "@hono/node-server allows running the Hono application on Node.js. From 2.0.0 until 2.0.10, a WebSocket upgrade request to an upgradeWebSocket route with a missing or malformed Sec-WebSocket-Key header causes src/websocket.ts to retain the request's IncomingMessage in waiterMap and leave waitForWebSocket pending because ws.handleUpgrade emits no connection event. The aborted handshake therefore has no cleanup path, allowing an unauthenticated attacker to flood a public route, cause unbounded memory growth, and eventually make the service unavailable. This issue is fixed in version 2.0.10.",
  "id": "CVE-2026-73565",
  "modified": "2026-08-16T03:31:23.023843622Z",
  "published": "2026-08-13T17:37:28.579Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/honojs/node-server/releases/tag/v2.0.10"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73565.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/honojs/node-server/security/advisories/GHSA-9mqv-5hh9-4cgg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73565"
    },
    {
      "type": "FIX",
      "url": "https://github.com/honojs/node-server/commit/3a21938c418340e980cb7ffa88e78369f78392d1"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "@hono/node-server: Unauthenticated memory-leak DoS via aborted WebSocket handshake"
}