CVE-2026-73565: medium-severity vulnerability in honojs node-server
@hono/node-server: Unauthenticated memory-leak DoS via aborted WebSocket handshake
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.5%
@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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
honojs · node-serverRelated CVEs — honojs node-server
In the same product, most dangerous first.
CVE-2024-32652HIGH@hono/node-server contains Denial of Service risk when receiving Host header that cannot be parsedEPSS 0.9%CVE-2024-23340MEDIUM@hono/node-server can't handle "double dots" in URLEPSS 0.7%CVE-2026-39406MEDIUM@hono/node-server has a middleware bypass via repeated slashes in serveStaticEPSS 0.4%CVE-2026-29087HIGH@hono/node-server: Authorization bypass for protected static paths via encoded slashes in Serve Static MiddlewareEPSS 0.4%CVE-2026-118663MEDIUM@hono/node-server: `serveStatic` decodes the request path a second time, leading to bypass of middleware on static pathsEPSS 0.4%