websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.1, when websocket-driver is used to implement a WebSocket server on top of a TCP server using WebSocket::Driver.server() or to complement a WebSocket client, a peer can make a single connection consume an unbounded amount of memory by sending an HTTP request or response with a never-ending list of headers. This can lead to the receiving process running out of memory. This issue is fixed in version 0.8.1.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-104955 advisory.

    websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.1, when websocket-driver     is used to implement a WebSocket server on top of a TCP server using WebSocket::Driver.server() or to     complement a WebSocket client, a peer can make a single connection consume an unbounded amount of memory     by sending an HTTP request or response with a never-ending list of headers. This can lead to the receiving     process running out of memory. This issue is fixed in version 0.8.1.

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.

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 0.8.1, when websocket-driver
    is used to implement a WebSocket server on top of a TCP server using WebSocket::Driver.server() or to
    complement a WebSocket client, a peer can make a single connection consume an unbounded amount of memory
    by sending an HTTP request or response with a never-ending list of headers. This can lead to the receiving
    process running out of memory. This issue is fixed in version 0.8.1. (CVE-2026-54465)

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 0.8.1, when websocket-driver     is used to implement a WebSocket server on top of a TCP server using WebSocket::Driver.server() or to     complement a WebSocket client, a peer can make a single connection consume an unbounded amount of memory     by sending an HTTP request or response with a never-ending list of headers. This can lead to the receiving     process running out of memory. This issue is fixed in version 0.8.1. (CVE-2026-54465)

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

ID	Name	Product	Family	Type	Severity
341391	Unity Linux 20.1070e Security Update: rubygem-websocket-driver (UTSA-2026-104955)	Nessus	Unity Linux Local Security Checks	Local	medium
446029	SCA: security update for websocket-driver (GHSA-8j3g-f24p-4mpw)	Tenable Cloud Security	SCA Checks	Local	medium
446029	SCA: security update for websocket-driver (GHSA-8j3g-f24p-4mpw)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
327775	Linux Distros Unpatched Vulnerability : CVE-2026-54465	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-54465

medium

Tenable Plugins

medium

medium

medium

medium