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.
History

Fri, 07 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

threat_severity

Important


Wed, 05 Aug 2026 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Socket
Socket socket.io
Vendors & Products Socket
Socket socket.io

Mon, 03 Aug 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 03 Aug 2026 19:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Socket.IO: Zero-attachment Memory Exhaustion
Weaknesses CWE-20
CWE-754
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-08-03T19:09:10.073Z

Updated: 2026-08-03T20:31:54.428Z

Reserved: 2026-08-03T16:00:23.482Z

Link: CVE-2026-69185

cve-icon Vulnrichment

Updated: 2026-08-03T20:31:46.564Z

cve-icon NVD

Status : Received

Published: 2026-08-03T20:17:29.797

Modified: 2026-08-03T21:16:41.857

Link: CVE-2026-69185

cve-icon Redhat

Severity : Important

Publid Date: 2026-08-03T19:09:10Z

Links: CVE-2026-69185 - Bugzilla