How many socket engine.io CVEs are in CISA KEV?

None of socket engine.io's CVEs are currently listed in CISA's Known Exploited Vulnerabilities catalog.

Are there public exploits for socket engine.io vulnerabilities?

Yes — 1 of socket engine.io's CVEs have a known public exploit.

Which versions of socket engine.io are affected?

17 distinct socket engine.io versions are named across its CVEs. Use the version filter above to see the CVEs affecting a specific version.

What are the most common weakness types in socket engine.io CVEs?

socket engine.io's CVEs most often map to these CWE weakness types: CWE-248 (Uncaught Exception), CWE-20 (Improper Input Validation), CWE-404 (Improper Resource Shutdown or Release), CWE-754 (Improper Check for Unusual or Exceptional Conditions).

What is the average severity of socket engine.io CVEs?

The average CVSS base score across socket engine.io's scored CVEs is 7.3.

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6 CVEs

socket engine.io Vulnerabilities

Name: socket engine.io vulnerability dataset (CVEs)
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

CVE security advisories and vulnerability history for engine.io by socket.

6

Total CVEs

Published

0

In CISA KEV

Exploited in the wild

1

Public exploits

PoC or exploit code

7.3

Avg CVSS

2021–2026

Last updated July 8, 2026

Overview

socket engine.io has 6 published CVE records since 2021, of which 0 are in CISA's Known Exploited Vulnerabilities catalog and 1 have a known public exploit. The average CVSS base score across scored CVEs is 7.3.

This page aggregates every publicly disclosed vulnerability (CVE) affecting socket engine.io, with a severity breakdown, the affected and patched versions, the most common weakness types, and the full CVE list.

Severity and exploitation

How the CVSS severity of socket engine.io's CVEs breaks down, plus how many are exploited in the wild or have public exploit code.

Critical0

High5

Medium1

Low0

In CISA’s Known Exploited Vulnerabilities catalog

0

None of socket engine.io's CVEs are currently listed in CISA's KEV catalog.

Public exploits

1

One of socket engine.io's CVEs has a known public exploit available.

Affected versions and CVEs

Browse every socket engine.io version named in a CVE, then pick one to see only the CVEs that affect it.

Version ranges

< 3.6.11 CVE
< 4.0.01 CVE
4.0.0 <= v < 4.1.21 CVE
4.0.0 <= v < 6.2.11 CVE
4.1.0 <= v < 6.6.71 CVE
5.0.0 <= v < 5.2.11 CVE
5.1.0 <= v < 6.4.21 CVE
6.0.0 <= v < 6.1.11 CVE
6.5.0 <= v < 6.6.71 CVE

Fixed in

6.6.72 CVEs
3.6.11 CVE
4.0.01 CVE
4.1.21 CVE
5.2.11 CVE
6.1.11 CVE
6.2.11 CVE
6.4.21 CVE

Find a version

6 CVEs

Sort

Socket.IO: Engine.IO Polling Transport Connection Exhaustion
CVE-2026-59725
Patch
CWE-404
High · CVSS 7.5
EPSS 0.4% (28th pct)2026-07-08
Socket.IO: Engine.IO WebTransport SID DoS
CVE-2026-59724
Patch
CWE-20
High · CVSS 7.5
EPSS 0.3% (26th pct)2026-07-08
Medium vulnerability · 2023-05-08
CVE-2023-31125
Patch
CWE-248
Medium · CVSS 6.5
EPSS 1.3% (68th pct)2023-05-08
High vulnerability · 2022-11-22
CVE-2022-41940
Public exploit
Patch
CWE-248
High · CVSS 7.1
EPSS 1.9% (78th pct)2022-11-22
High vulnerability · 2022-01-12
CVE-2022-21676
Patch
CWE-754
High · CVSS 7.5
EPSS 2.8% (85th pct)2022-01-12
High vulnerability · 2021-01-07
CVE-2020-36048
Patch
High · CVSS 7.5
EPSS 3.2% (87th pct)2021-01-07

Common weakness types

The CWE weakness categories most often found in socket engine.io CVEs. Follow any weakness for its full explanation.

Disclosure activity by year

How many socket engine.io CVEs were published each year.

2021

1

2022

2

2023

1

2026

2

Other socket products

Browse vulnerabilities for other products by socket.

socket.io-parser4 CVEs socket.io3 CVEs engine.io-client1 CVEs socket.io-client java1 CVEs

All socket vulnerabilities

Frequently asked questions

Common questions about socket engine.io vulnerabilities.

How many CVEs does socket engine.io have?: socket engine.io has 6 published CVE records since 2021.
How many socket engine.io CVEs are in CISA KEV?: None of socket engine.io's CVEs are currently listed in CISA's Known Exploited Vulnerabilities catalog.
Are there public exploits for socket engine.io vulnerabilities?: Yes — 1 of socket engine.io's CVEs have a known public exploit.
Which versions of socket engine.io are affected?: 17 distinct socket engine.io versions are named across its CVEs. Use the version filter above to see the CVEs affecting a specific version.
What are the most common weakness types in socket engine.io CVEs?: socket engine.io's CVEs most often map to these CWE weakness types: CWE-248 (Uncaught Exception), CWE-20 (Improper Input Validation), CWE-404 (Improper Resource Shutdown or Release), CWE-754 (Improper Check for Unusual or Exceptional Conditions).
What is the average severity of socket engine.io CVEs?: The average CVSS base score across socket engine.io's scored CVEs is 7.3.

References

Vulnerability data is sourced from the CVE Program; severity, KEV, and exploit signals are aggregated by RadicalNotion.AI.

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