websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.1, draft versions of the WebSocket protocol in websocket-driver include a length header that allows an arbitrarily large integer to be encoded as bytes with the high bit set, and a server or client can send an indefinite sequence of 0x80 or higher bytes that the peer parses into an ever-growing Ruby integer. This can make a WebSocket connection consume an unbounded amount of memory and lead to the host process running out of memory. This issue is fixed in version 0.8.1.
History

Tue, 10 Nov 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Thu, 23 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Faye
Faye websocket-driver-ruby
Vendors & Products Faye
Faye websocket-driver-ruby

Fri, 17 Jul 2026 20:15:00 +0000

Type Values Removed Values Added
Description websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.1, draft versions of the WebSocket protocol in websocket-driver include a length header that allows an arbitrarily large integer to be encoded as bytes with the high bit set, and a server or client can send an indefinite sequence of 0x80 or higher bytes that the peer parses into an ever-growing Ruby integer. This can make a WebSocket connection consume an unbounded amount of memory and lead to the host process running out of memory. This issue is fixed in version 0.8.1.
Title websocket-driver: Memory exhaustion via abuse of protocol length headers
Weaknesses CWE-770
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-07-17T20:05:17.888Z

Updated: 2026-07-20T16:58:33.914Z

Reserved: 2026-06-15T15:30:40.319Z

Link: CVE-2026-54463

cve-icon Vulnrichment

Updated: 2026-07-20T16:56:08.688Z

cve-icon NVD

Status : Analyzed

Published: 2026-07-17T20:17:26.633

Modified: 2026-10-24T20:10:00.137

Link: CVE-2026-54463

cve-icon Redhat

No data.