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CVE-2022-21676

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CVE-2022-21676

Published: Jan 12, 2022

Modified: Apr 23, 2025

PUBLISHED

CVSS v3.1

7.5

HIGH

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 starting from version `4.0.0`, including those who uses depending packages like `socket.io`. Versions prior to `4.0.0` are not impacted. A fix has been released for each major branch, namely `4.1.2` for the `4.x.x` branch, `5.2.1` for the `5.x.x` branch, and `6.1.1` for the `6.x.x` branch. There is no known workaround except upgrading to a safe version.

VendorProductVersions

socketio

engine.io

affected
>= 4.0.0, < 4.1.2
affected
>= 5.0.0, < 5.2.1
affected
>= 6.0.0, < 6.1.1

Weaknesses (CWE)

CWE-754

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

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