CVE-2026-69185

Socket.IO enables bidirectional and low-latency communication for every platform. Prior to 4.2.7, 3.4.5, and 3.3.6, 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 vulnerability is fixed in 4.2.7, 3.4.5, and 3.3.6.

Score

CVSS 3.1 7.5 High

Status

Awaiting Analysis - security-advisories@github.com

Published

2026-08-03

Last modified

2026-10-23

Weaknesses

CWE-20, CWE-754

Affected products

• Socket.io (Socketio)

References

• https://github.com/socketio/socket.io/security/advisories/GHSA-2m8v-j782-fhvr
• https://github.com/socketio/socket.io/commit/7c6ef571a00656718e9e05e3b948fd1758b2a7b4
• https://github.com/socketio/socket.io/commit/9c6323e5cde41bd75df3379b5fc9293664a5f240
• https://github.com/socketio/socket.io/commit/ced94ffa3ac020a8f3c14eb98a3bf34acb14d291