CVE-2022-41940

Name: CVE-2022-41940
Creator: NVD / NIST
Published: 2022-11-22T01:15:37.847+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.94%

Last modified Jun 17, 2026

CVE-2022-41940 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Engine.IO is the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. A specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server, thus killing the Node.js process. EPSS estimates a 1.94% chance of exploitation in the next 30 days.

Description

Engine.IO is the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. A specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server, thus killing the Node.js process. This impacts all the users of the engine.io package, including those who uses depending packages like socket.io. There is no known workaround except upgrading to a safe version. There are patches for this issue released in versions 3.6.1 and 6.2.1.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.94%

77.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-248

Affected Software

Vendor	Product	Versions
Socket	Engine.Io	< 3.6.1
Socket	Engine.Io	>= 4.0.0, < 6.2.1

References

https://github.com/socketio/engine.io/commit/425e833ab13373edf1dd5a0706f07100db14e3c6Patch, Third Party Advisory
https://github.com/socketio/engine.io/commit/83c4071af871fc188298d7d591e95670bf9f9085Patch, Third Party Advisory
https://github.com/socketio/engine.io/security/advisories/GHSA-r7qp-cfhv-p84wExploit, Third Party Advisory
https://github.com/socketio/engine.io/commit/425e833ab13373edf1dd5a0706f07100db14e3c6Patch, Third Party Advisory
https://github.com/socketio/engine.io/commit/83c4071af871fc188298d7d591e95670bf9f9085Patch, Third Party Advisory
https://github.com/socketio/engine.io/security/advisories/GHSA-r7qp-cfhv-p84wExploit, Third Party Advisory

Timeline

Published: Nov 22, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-41940?

How severe is CVE-2022-41940?

CVE-2022-41940 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.94% probability of exploitation in the next 30 days.

How do I fix CVE-2022-41940?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-41940?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST