Socket.IO

registrynpm

package namesocket.io

maintainerSocket.IO Contributors

Socket.IO is the standard library for real-time bidirectional communication in Node.js, providing WebSocket transport with automatic fallback to HTTP long-polling. It is used in chat applications, collaborative tools, live dashboards, and real-time game backends. The server side manages client connections and room memberships.

api usage

Checking Socket.IO

socket.io 4.7.0 is a clean version with no known supply chain compromise. The response returns compromised: false with an empty sources array.

bash

curl "https://api.attestd.io/v1/check?product=socket.io&version=4.7.0" \
  -H "Authorization: Bearer YOUR_API_KEY"

json

{
  "product": "socket.io",
  "version": "4.7.0",
  "supported": true,
  "risk_state": "none",
  "supply_chain": {
    "compromised": false,
    "sources": [],
    "malware_type": null,
    "description": null,
    "advisory_url": null,
    "compromised_at": null,
    "removed_at": null
  },
  "last_updated": "2026-05-01T00:00:00Z"
}

attack surface

Why this package is monitored

Real-time communication frameworks maintain long-lived connections between clients and the server. A backdoored Socket.IO version can passively intercept all events from all connected clients, including authentication tokens sent on connection establishment.

Attestd monitors socket.io using the following detection sources:

registry

Manually curated advisories in the Attestd registry, verified by a human analyst. Confidence 1.0.

osv

OSV.dev malicious-package advisories with IDs prefixed MAL-. Confidence 0.95.

npm_deprecation

npm package versions with deprecation messages containing targeted attack language such as malicious, backdoor, or compromised. Confidence 0.80.

Supply chain overview All npm packages Express NestJS Core Response fields