MEDIUMVulnerability
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.
Properties
- severity
- MEDIUM
- score
- 5.3
- epss_score
- 0.00388
- cve_id
- CVE-2026-73565
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- published_at
- 2026-08-13T18:18:19.103
- last_modified
- 2026-09-10T20:30:11.423
- epss_percentile
- 0.32248
Related Entities (4)
ENRICHED_BY (1)
→[Source]FIRST EPSS
HAS_WEAKNESS (2)
→[Weakness]Missing Release of Memory after Effective Lifetime
→[Weakness]Allocation of Resources Without Limits or Throttling
DESCRIBED_BY (1)
→[Source]NVD
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