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CVE-2026-33151

socket.io allows an unbounded number of binary attachments

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.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Socket
Products
Socket.io Socket.io-parser
CVE-2022-2421

Socket.io - Improper type validation in attachment parsing

Due to improper type validation in attachment parsing the Socket.io js library, it is possible to overwrite the _placeholder object which allows an attacker to place references to functions at arbitrary places in the resulting query object.

CVSS 3.1 · 10 Critical EPSS 1.4% KEV · Not listed
Vendors
Socket
Products
Socket.io-parser
CVE-2023-32695

Insufficient validation when decoding a Socket.IO packet

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 · 7.3 High EPSS 1.1% KEV · Not listed
Vendors
Socket
Products
Socket.io-parser
CVE-2020-36049

yarnpkg-socket.io-parser: a denial of service (memory consumption) via a large packet because a concatenation approach is used

socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.

CVSS 3.1 · 7.5 High EPSS 2.7% KEV · Not listed
Vendors
Socket
Products
Socket.io-parser