CVE-2026-73565
CVE-2026-73565 · @hono/node-server: Unauthenticated memory-leak DoS via aborted WebSocket handshake
This page contains facts from public vulnerability sources. Check the original advisory before updating.
@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.
CVSS 5.3 · Medium · EPSS 0.5% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
node-server
- Versions
- >= 2.0.0, < 2.0.10: Affected
No fix published
@hono/node-server npm
- Affected ranges
- SEMVER: ≥ 2.0.0, < 2.0.10
Update to 2.0.10