CVE-2026-73565

{
  "id": "CVE-2026-73565",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-13T18:18:19.103",
  "lastModified": "2026-10-24T15:10:00.190",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "@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."
    },
    {
      "lang": "es",
      "value": "@hono/node-server permite ejecutar la aplicación Hono en Node.js. Desde la 2.0.0 hasta la 2.0.10, una solicitud de actualización de WebSocket a una ruta upgradeWebSocket con un encabezado Sec-WebSocket-Key faltante o malformado hace que src/websocket.ts retenga el IncomingMessage de la solicitud en waiterMap y deje waitForWebSocket pendiente porque ws.handleUpgrade no emite ningún evento de conexión. El handshake abortado, por lo tanto, no tiene una ruta de limpieza, lo que permite a un atacante no autenticado inundar una ruta pública, causar un crecimiento de memoria ilimitado y, finalmente, dejar el servicio no disponible. Este problema está solucionado en la versión 2.0.10."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "honojs",
          "product": "node-server",
          "versions": [
            {
              "version": ">= 2.0.0, < 2.0.10",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-14T16:45:01.113756Z",
          "id": "CVE-2026-73565",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        },
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/honojs/node-server/commit/3a21938c418340e980cb7ffa88e78369f78392d1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/honojs/node-server/releases/tag/v2.0.10",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/honojs/node-server/security/advisories/GHSA-9mqv-5hh9-4cgg",
      "source": "[email protected]"
    }
  ]
}