Socket.IO is an open source, real-time, bidirectional, event-based, communication framework. A specially crafted Socket.IO packet can trigger an uncaught exception on the Socket.IO server, thus killing the Node.js process. This issue is fixed by commit 15af22fc22
which has been included in socket.io@4.6.2
(released in May 2023). The fix was backported in the 2.x branch as well with commit d30630ba10
. Users are advised to upgrade. Users unable to upgrade may attach a listener for the "error" event to catch these errors.