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  5. CVE-2024-38355

CVE-2024-38355: socket.io has an unhandled 'error' event

June 19, 2024 (updated September 24, 2026)

A specially crafted Socket.IO packet can trigger an uncaught exception on the Socket.IO server, thus killing the Node.js process.

node:events:502
throw err; // Unhandled 'error' event
^

Error [ERR_UNHANDLED_ERROR]: Unhandled error. (undefined)
at new NodeError (node:internal/errors:405:5)
at Socket.emit (node:events:500:17)
at /myapp/node_modules/socket.io/lib/socket.js:531:14
at process.processTicksAndRejections (node:internal/process/task_queues:77:11) {
code: 'ERR_UNHANDLED_ERROR',
context: undefined
}

References

  • github.com/advisories/GHSA-25hc-qcg6-38wj
  • github.com/socketio/socket.io/commit/15af22fc22bc6030fcead322c106f07640336115
  • github.com/socketio/socket.io/commit/d30630ba10562bf987f4d2b42440fc41a828119c
  • github.com/socketio/socket.io/security/advisories/GHSA-25hc-qcg6-38wj
  • nvd.nist.gov/vuln/detail/CVE-2024-38355

Code Behaviors & Features

Detect and mitigate CVE-2024-38355 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →

Affected versions

All versions before 2.5.1, all versions starting from 3.0.0 before 4.6.2

Fixed versions

  • 2.5.1
  • 4.6.2

Solution

Upgrade to versions 2.5.1, 4.6.2 or above.

Impact 7.3 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Learn more about CVSS

Weakness

  • CWE-20: Improper Input Validation
  • CWE-754: Improper Check for Unusual or Exceptional Conditions

Source file

npm/socket.io/CVE-2024-38355.yml

Spotted a mistake? Edit the file on GitLab.

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