CVE-2026-61666CWE-248

CVE-2026-61666

published August 17, 2026

CVSS
8.9
EPSS
0%
Percentile
37.7
In the wild
Unconfirmed
What it is

websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.2, WebSocket::Driver.server() passes a malformed Host header to URI.parse in lib/websocket/http/request.rb without catching URI::InvalidURIError, allowing a remote client to crash a TCP-backed WebSocket server when the application does not catch the error from parse(). This issue is fixed in version 0.8.2.

The record
Technical detail
CVSS
8.9 · NONE
CVSS v4.0
8.9 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
EPSS
0.00445 · 37.7th percentile
Weakness
CWE-248 · Uncaught Exception
Published
2026-08-17T21:16Z
References (2)
https://github.com/faye/websocket-driver-ruby/commit/7d6fd87759a2fdc83590d3b49ffa661dc53fa128 · [email protected]https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-2x63-gw47-w4mm · [email protected]
EPSS history
Timeline
  • 17 AUG 16:16Z
    websocket-driver: Denial of service via malformed Host header
    cvelistv5