Is CVE-2026-73561 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-73561 being exploited in the wild.

How severe is CVE-2026-73561?

High severity, with a CVSS score of 7.5, published 13 August 2026.

Which products and versions are affected?

@anephenix/hub (npm) SEMVER:introduced=0,fixed=0.2.16.

Is there a fix for CVE-2026-73561?

Yes. @anephenix/hub (npm): upgrade to 0.2.16 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-73561 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-73561?

Check whether you run @anephenix/hub (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-73561: anephenix hub unauthenticated WebSocket RPC resource exhaustion

CVE-2026-73561 · Severity: high · CVSS 7.5 · Published 2026-08-13

@anephenix/hub is a Node.js WebSocket server library used to facilitate real-time client communication. An unauthenticated attacker can open many WebSocket connections without responding to server RPC messages, causing the server to accumulate uncleaned timers and memory objects indefinitely. This exhausts the server's CPU and memory, making it unavailable to legitimate users.

Vendors: npm.

Quick answers

Is CVE-2026-73561 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-73561 being exploited in the wild.
How severe is CVE-2026-73561?: High severity, with a CVSS score of 7.5, published 13 August 2026.
Which products and versions are affected?: @anephenix/hub (npm) SEMVER:introduced=0,fixed=0.2.16.
Is there a fix for CVE-2026-73561?: Yes. @anephenix/hub (npm): upgrade to 0.2.16 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-73561 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-73561?: Check whether you run @anephenix/hub (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

@anephenix/hub (npm): upgrade to 0.2.16 or later
```
npm install @anephenix/hub@0.2.16
```

Technical details

The vulnerability is a resource exhaustion (DoS) in the WebSocket connection handler. When a client connects, the server initiates an RPC request to fetch a client ID via setInterval polling (every 10 ms). If the client never replies, the polling interval and pending request object are never cleaned up—even after the socket closes—because the cleanup logic only triggers on a successful response and there is no timeout handler or socket-close cleanup. An unauthenticated attacker on the network can exploit this by opening many WebSocket connections and never responding, forcing the server to accumulate one interval timer and heap object per connection indefinitely. No authentication, special configuration, or protocol knowledge is required. Patch available in version 0.2.16.

Affected products

anephenix hub <= 0.2.15

Identifiers

CVE-2026-73561
GHSA-g5vv-q72c-7j78

Timeline

2026-07-24: disclosed
2026-07-24: patched: Fixed in version 0.2.16

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.