7.1

CVE-2022-41940: socket engine.io Uncaught Exception

CVSS: 7.1v3.1HighModified
AliasesGHSA-r7qp-cfhv-p84w
Published 22-11-2022Last modified 22-04-2025
Open JSON

Vulnerability summary

CVE-2022-41940 is a high (CVSS 7.1) Uncaught Exception vulnerability in socket engine.io. EPSS estimates a 2.07% chance of exploitation in the next 30 days, higher than 81.1% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
39/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
2.07%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 22-11-2022
    PublishedVulnerability first disclosed.
  2. 22-04-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

2.07%

Chance of exploitation in the next 30 days

Percentile

81%

Versus all other CVEs

30-day change

+0.08 pp

From 1.99% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.07%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Engine.Io

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Npm1 product
  • engine.io< 3.6.1 | ≥ 4.0.0, < 6.2.1
Socket1 product
Socketio1 product

3 vendors · 3 products

References

5 links