CVE-2026-73565 (GCVE-0-2026-73565)

Vulnerability from cvelistv5 – Published: 2026-08-13 17:37 – Updated: 2026-08-14 16:45
VLAI
Title
@hono/node-server: Unauthenticated memory-leak DoS via aborted WebSocket handshake
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.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 16:45 UTC
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7618 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
honojs node-server Affected: >= 2.0.0, < 2.0.10
guessed Create a notification for this product.
Show details on NVD website
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