CVE-2026-33151

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-33151
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.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/socketio/socket.io/commit/719f9ebab0772ffb882bd614b387e585c1aa75d4 Patch
https://github.com/socketio/socket.io/commit/9d39f1f080510f036782f2177fac701cc041faaf Patch
https://github.com/socketio/socket.io/commit/b25738c416c4e32fbff62ee182afa8f6d0dacf78 Patch
https://github.com/socketio/socket.io/security/advisories/GHSA-677m-j7p3-52f9 Patch Vendor Advisory
Configurations

Configuration 1 (hide)

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

14 Apr 2026, 18:22

Type Values Removed Values Added
References () https://github.com/socketio/socket.io/commit/719f9ebab0772ffb882bd614b387e585c1aa75d4 - () https://github.com/socketio/socket.io/commit/719f9ebab0772ffb882bd614b387e585c1aa75d4 - Patch
References () https://github.com/socketio/socket.io/commit/9d39f1f080510f036782f2177fac701cc041faaf - () https://github.com/socketio/socket.io/commit/9d39f1f080510f036782f2177fac701cc041faaf - Patch
References () https://github.com/socketio/socket.io/commit/b25738c416c4e32fbff62ee182afa8f6d0dacf78 - () https://github.com/socketio/socket.io/commit/b25738c416c4e32fbff62ee182afa8f6d0dacf78 - Patch
References () https://github.com/socketio/socket.io/security/advisories/GHSA-677m-j7p3-52f9 - () https://github.com/socketio/socket.io/security/advisories/GHSA-677m-j7p3-52f9 - Patch, Vendor Advisory
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5
CPE cpe:2.3:a:socket:socket.io-parser:*:*:*:*:*:node.js:*:*
Summary
  • (es) Socket.IO es un framework de comunicación de código abierto, en tiempo real, bidireccional y basado en eventos. Antes de las versiones 3.3.5, 3.4.4 y 4.2.6, un paquete de Socket.IO especialmente diseñado puede hacer que el servidor espere un gran número de adjuntos binarios y los almacene en búfer, lo cual puede ser explotado para agotar la memoria del servidor. Este problema ha sido parcheado en las versiones 3.3.5, 3.4.4 y 4.2.6.
CWE NVD-CWE-noinfo
First Time Socket socket.io-parser
Socket

20 Mar 2026, 21:17

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-20 21:17

Updated : 2026-04-14 18:22

NVD link : CVE-2026-33151

Mitre link : CVE-2026-33151

CVE.ORG link : CVE-2026-33151

JSON object : View

Products Affected

socket

  • socket.io-parser
CWE
CWE-20

Improper Input Validation

CWE-754

Improper Check for Unusual or Exceptional Conditions

NVD-CWE-noinfo