CVE-2026-73561
CVE-2026-73561 · Hub: Unauthenticated WebSocket RPC Waiter Resource Exhaustion
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Hub is a Node.js WebSocket server and client with added features. Prior to 0.2.16, every incoming unauthenticated WebSocket connection triggers loadDefaultConnectionEventListeners to call requestClientId, which calls rpc.send for the get-client-id action and pushes a request into RPC.requests. The RPC.waitForReply function starts a setInterval polling loop every 10 milliseconds that is cleared only after a matching reply; if the client remains silent and closes, the timer and pending request stay allocated because the socket close path does not cancel them. Repeated connections therefore cause unbounded timers and heap entries, exhausting CPU and memory and making the server unavailable. This issue is fixed in version 0.2.16.
CVSS 7.5 · High · EPSS 0.6% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
hub
- Versions
- < 0.2.16: Affected
No fix published
@anephenix/hub npm
- Affected ranges
- SEMVER: < 0.2.16
Update to 0.2.16