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.

INFO

Published Date :

2026-03-20T20:13:31.424Z

Last Modified :

2026-03-23T16:50:16.998Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-33151 vulnerability.

Vendors Products
Socket
  • Socket.io
  • Socket.io-parser
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-33151.

URL Resource
https://github.com/socketio/socket.io/commit/719f9ebab0772ffb882bd614b387e585c1aa75d4 cve-icon cve-icon cve-icon
https://github.com/socketio/socket.io/commit/9d39f1f080510f036782f2177fac701cc041faaf cve-icon cve-icon cve-icon
https://github.com/socketio/socket.io/commit/b25738c416c4e32fbff62ee182afa8f6d0dacf78 cve-icon cve-icon cve-icon
https://github.com/socketio/socket.io/security/advisories/GHSA-677m-j7p3-52f9 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-33151 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-33151 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
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Attack Requirements
Privileges Required
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SS Confidentiality
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SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact