{"id":"CVE-2026-73565","summary":"@hono/node-server: Unauthenticated memory-leak DoS via aborted WebSocket handshake","details":"@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.","aliases":["GHSA-9mqv-5hh9-4cgg"],"modified":"2026-08-16T03:31:23.023843622Z","published":"2026-08-13T17:37:28.579Z","database_specific":{"cwe_ids":["CWE-401","CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73565.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/honojs/node-server/releases/tag/v2.0.10"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73565.json"},{"type":"ADVISORY","url":"https://github.com/honojs/node-server/security/advisories/GHSA-9mqv-5hh9-4cgg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73565"},{"type":"FIX","url":"https://github.com/honojs/node-server/commit/3a21938c418340e980cb7ffa88e78369f78392d1"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/honojs/node-server","events":[{"introduced":"58c9355998b3b202bf7eb22b1505a2d4d847c3b0"},{"fixed":"3a21938c418340e980cb7ffa88e78369f78392d1"},{"fixed":"7c1457ed5536c02fdd2f001129fae67bcbca54a1"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"2.0.0"},{"fixed":"2.0.10"}]}}],"versions":["v2.0.9","v2.0.8","v2.0.7","v2.0.6","v2.0.5","v2.0.4","v2.0.3","v2.0.2","v2.0.1","v2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73565.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}