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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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.
    (CVE-2026-61666)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-104953 advisory.

    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.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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.
    (CVE-2026-61666)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
478216	SCA: security update for websocket-driver (GHSA-2x63-gw47-w4mm)	Tenable Cloud Security	SCA Checks	Local	high
478216	SCA: security update for websocket-driver (GHSA-2x63-gw47-w4mm)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
341492	Unity Linux 20.1070e Security Update: rubygem-websocket-driver (UTSA-2026-104953)	Nessus	Unity Linux Local Security Checks	Local	high
337372	Linux Distros Unpatched Vulnerability : CVE-2026-61666	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-61666

high

Tenable Plugins

high

high

high

high