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Vulnerability record · CVE-2023-32695 · published 27 May 2023

CVE-2023-32695: Socket.io-parser improper input validation vulnerability

Socket · Socket.Io Parser

socket.io parser is a socket.io encoder and decoder written in JavaScript complying with version 5 of socket.io-protocol. A specially crafted Socket.IO packet can trigger an uncaught exception on the Socket.IO server, thus killing the Node.js process. A patch has been released in version 4.2.3.

7.5 CVSS 3.1 High EPSS 1.1% · top 37.1% CWE-20 · Improper input validationCWE-754 · CWE-754
7.5CVSS 3.1 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

socket.io parser is a socket.io encoder and decoder written in JavaScript complying with version 5 of socket.io-protocol. A specially crafted Socket.IO packet can trigger an uncaught exception on the Socket.IO server, thus killing the Node.js process. A patch has been released in version 4.2.3.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/socketio/socket.io-parser/commit/2dc3c92622dad113b8676be06f23b1ed46b02ced Patch
https://github.com/socketio/socket.io-parser/commit/3b78117bf6ba7e99d7a5cfc1ba54d0477554a7f3 Patch
https://github.com/socketio/socket.io-parser/releases/tag/4.2.3 Release Notes
https://github.com/socketio/socket.io-parser/security/advisories/GHSA-cqmj-92xf-r6r9 Vendor Advisory
https://github.com/socketio/socket.io-parser/commit/2dc3c92622dad113b8676be06f23b1ed46b02ced Patch
https://github.com/socketio/socket.io-parser/commit/3b78117bf6ba7e99d7a5cfc1ba54d0477554a7f3 Patch
https://github.com/socketio/socket.io-parser/releases/tag/4.2.3 Release Notes
https://github.com/socketio/socket.io-parser/security/advisories/GHSA-cqmj-92xf-r6r9 Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2023-32695), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.