CVE-2026-73565

@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 v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/honojs/node-server/commit/3a21938c418340e980cb7ffa88e78369f78392d1
https://github.com/honojs/node-server/releases/tag/v2.0.10
https://github.com/honojs/node-server/security/advisories/GHSA-9mqv-5hh9-4cgg

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-13 18:18

Updated : 2026-09-10 20:30

NVD link : CVE-2026-73565

Mitre link : CVE-2026-73565

CVE.ORG link : CVE-2026-73565

JSON object : View

Products Affected

No product.

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

CWE-770

Allocation of Resources Without Limits or Throttling

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