Socket.IO is a widely used npm package. As of 2026-05-24, there are 3 known vulnerabilities in the OSV database. The latest stable version is 4.8.3. Developers should audit their dependency trees and update to patched versions.
Package Overview
Known Vulnerabilities (3)
| ID | Severity | Score | Affected Versions | Fixed In | Description |
|---|---|---|---|---|---|
| CVE-2017-16031 | HIGH | 7.5 | 0 to 0.9.7 | 0.9.7 | Insecure randomness in socket.io |
| CVE-2024-38355 | MODERATE | 5.0 | 0 to 2.5.1; 3.0.0 to 4.6.2 | 2.5.1 | socket.io has an unhandled 'error' event |
| CVE-2020-28481 | MODERATE | 5.0 | 0 to 2.4.0 | 2.4.0 | CORS misconfiguration in socket.io |
Security Recommendations
- Pin Socket.IO to the latest stable version (4.8.3) in your dependency manifest
- Enable automated dependency updates with Dependabot or Renovate
- Run regular vulnerability scans using
npm audit - Review your lock file (.package-lock.json) after every update
- Monitor the OSV database and NIST NVD for new advisories
FAQ
Is Socket.IO safe to use?
Socket.IO is actively maintained and widely used. As of 2026-05-24, there are 3 known vulnerabilities listed in the OSV database. Most have patches available. Keeping your dependencies updated and running regular security audits significantly reduces risk.
What vulnerabilities does Socket.IO have?
The OSV database currently lists 3 vulnerabilities for Socket.IO. These range in severity and are detailed in the vulnerability table above. Check the linked advisories for full technical details and remediation guidance.
How do I update Socket.IO to fix vulnerabilities?
Run npm update socket.io or npm install socket.io@latest to get the newest version. Use npm audit to identify vulnerable dependencies in your project. Enable automated updates with Dependabot or Renovate to stay current.
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