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I. Basic Information for CVE-2026-33151
Vulnerability Information

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Vulnerability Title
socket.io allows an unbounded number of binary attachments
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Socket.IO 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Socket.IO是Socket.IO公司的一个面向实时web 应用的 JavaScript 库。 Socket.IO 3.3.5之前版本、3.4.4之前版本和4.2.6之前版本存在代码问题漏洞,该漏洞源于处理特制Socket.IO数据包时服务器会缓冲大量二进制附件,可能导致服务器内存耗尽。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
socketiosocket.io < 3.3.5 -
II. Public POCs for CVE-2026-33151
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III. Intelligence Information for CVE-2026-33151
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