This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-61666 →

UBUNTU-CVE-2026-61666

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....

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV