CVE-2026-73561 PUBLISHED

Hub: Unauthenticated WebSocket RPC Waiter Resource Exhaustion

Assigner: GitHub_M
Reserved: 12.08.2026 Published: 13.08.2026 Updated: 13.08.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Product Status

Vendor anephenix
Product hub
Versions
  • Version < 0.2.16 is affected

References

Problem Types

  • CWE-400: Uncontrolled Resource Consumption CWE