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VULNERABILITIES

CVE-2026-33151 Details

Description

Socket.IO is an open source, real-time, bidirectional, event-based, communication framework. Prior to versions 3.3.5, 3.4.4, and 4.2.6, a specially crafted Socket.IO packet can make the server wait for a large number of binary attachments and buffer them, which can be exploited to make the server run out of memory. This issue has been patched in versions 3.3.5, 3.4.4, and 4.2.6.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/socketio/socket.io/commit/719f9ebab0772ffb882bd614b387e585c1aa75d4 [email protected]Patch
https://github.com/socketio/socket.io/commit/9d39f1f080510f036782f2177fac701cc041faaf [email protected]Patch
https://github.com/socketio/socket.io/commit/b25738c416c4e32fbff62ee182afa8f6d0dacf78 [email protected]Patch
https://github.com/socketio/socket.io/security/advisories/GHSA-677m-j7p3-52f9 [email protected]PatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
NVD-CWE-noinfoInsufficient Information to Classify Weakness[email protected]
CWE-20Improper Input Validation[email protected]
CWE-754Improper Check for Unusual or Exceptional Conditions[email protected]

Affected Products

ProductVersions
socket socket.io-parser
< 3.3.5
>= 3.4.0, < 3.4.4
>= 4.0.0, < 4.2.6

CPE

  • cpe:2.3:a:socket:socket.io-parser:*:*:*:*:*:node.js:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-33151
NVD Published Date:
Mar 20, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-33151 Details - Not Deferred