How severe is CVE-2022-41940?

CVE-2022-41940 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability high.

Is CVE-2022-41940 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-41940?

CVE-2022-41940 affects Socket Engine.io. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-41940?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-41940 published?

CVE-2022-41940 was published on 2022-11-22 and last updated on 2026-06-17.

CVE-2022-41940

CVE-2022-41940 is a high-severity vulnerability in Socket Engine.io with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-248.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-248
Affected product: Socket Engine.io
Published: 2022-11-22
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2022-41940?: 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.
How severe is CVE-2022-41940?: CVE-2022-41940 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability high.
Is CVE-2022-41940 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-41940?: CVE-2022-41940 affects Socket Engine.io. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-41940?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-41940 published?: CVE-2022-41940 was published on 2022-11-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:socket:engine.io:*:*:*:*:*:node.js:*:*

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