# Node.js Adapter for Hono: Unauthenticated memory-leak DoS via aborted WebSocket handshake

Advisory record · `GHSA-9mqv-5hh9-4cgg`

- **Identifiers:** `GHSA-9mqv-5hh9-4cgg` · `CVE-2026-73565`
- **State:** Confirmed
- **Severity:** CVSS 5.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-401](https://cwe.mitre.org/data/definitions/401.html) · [CWE-770](https://cwe.mitre.org/data/definitions/770.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md)
- **Published:** 21 Jul 2026
- **Updated:** 13 Aug 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 21 Jul 2026, 22:04 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `@hono/node-server` (npm): affected `>=2.0.0, <2.0.10`; fixed in `2.0.10`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 5.3 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0053, the 45th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 21 Jul 2026. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-9mqv-5hh9-4cgg](https://github.com/advisories/GHSA-9mqv-5hh9-4cgg)
- [OSV: GHSA-9mqv-5hh9-4cgg](https://osv.dev/vulnerability/GHSA-9mqv-5hh9-4cgg)
- <https://github.com/honojs/node-server/security/advisories/GHSA-9mqv-5hh9-4cgg>
- <https://github.com/honojs/node-server/commit/3a21938c418340e980cb7ffa88e78369f78392d1>
- <https://github.com/honojs/node-server>
- <https://github.com/honojs/node-server/releases/tag/v2.0.10>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-9mqv-5hh9-4cgg>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-9mqv-5hh9-4cgg/>. Everything for agents: <https://agentprime.io/llms.txt>.