CVE-2023-32695: Socket Socket.io-Parser

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

socket.io parser is a socket.io encoder and decoder written in JavaScript complying with version 5 of socket.io-protocol. A specially crafted Socket.IO packet can trigger an uncaught exception on the Socket.IO server, thus killing the Node.js process. A patch has been released in version 4.2.3.

Affected products

• Socket Socket.io-Parser: from 3.4.0, before 3.4.3 (fixed in 3.4.3); from 4.0.4, before 4.2.3 (fixed in 4.2.3)

Published 2023-05-27. Last modified 2026-06-17.