More information about this security flaw is available in the following bug: https://bugzilla.redhat.com/show_bug.cgi?id=2311152 Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
The python-socketio package does not contain a copy of express.js. It is merely mentioned in some JavaScript-based example projects in the documentation.