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NVD description
@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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
CVE-2026-73565 Denial Of Service In @hono/node-server WebSocket Upgrade Requests https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-73565
Post summary
The text briefly highlights a DoS vulnerability in hono/node-server’s WebSocket upgrade handling, but offers minimal context or actionable information.