@hono/node-server: Unauthenticated memory-leak DoS via aborted WebSocket handshake

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-73565
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-13 18:18:19 UTC
Updated2026-08-13 18:18:19 UTC
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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Problem Types: CWE-401 | CWE-770 | CWE-401 CWE-401: Missing Release of Memory after Effective Lifetime | CWE-770 CWE-770: Allocation of Resources Without Limits or Throttling

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Honojs Node-server affected >= 2.0.0, < 2.0.10 Not specified

References

ReferenceSourceLinkTags
github.com/honojs/node-server/commit/3a21938c418340e980cb7ffa88e78369f78... [email protected] github.com
github.com/honojs/node-server/security/advisories/GHSA-9mqv-5hh9-4cgg [email protected] github.com
github.com/honojs/node-server/releases/tag/v2.0.10 [email protected] github.com
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