CVE-2026-73565@hono/node-server: Unauthenticated memory-leak DoS via aborted WebSocket handshake
Updated under an hour ago ()
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It affects honojs node-server. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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@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 (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weakness (CWE)
- CWE-401, CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
honojs node-server honojs:node_server (from the name) | from 2.0.0, < 2.0.10 | CNA record |
References
- https://github.com/honojs/node-server/security/advisories/GHSA-9mqv-5hh9-4cggx-refsource-confirm
- https://github.com/honojs/node-server/commit/3a21938c418340e980cb7ffa88e78369f78392d1x-refsource-misc
- https://github.com/honojs/node-server/releases/tag/v2.0.10x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.