CVE-2026-73565

Summary

@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.

Affected Software

VendorProductVersion RangeStatus
honojsnode-server>= 2.0.0, < 2.0.10affected

Weaknesses

  • CWE-401: CWE-401: Missing Release of Memory after Effective Lifetime
  • CWE-770: CWE-770: Allocation of Resources Without Limits or Throttling

References