### Impact If this library is used in tandem with the `permessage-deflate` extension, a WebSocket server or client can be made to accept messages that are larger than the configured maximum message size. This is because this limit is checked against the message frames' length headers, which give the size of the compressed data, not the size after decompression. This can lead to applications accepting larger messages than expected and exceeding their intended resource usage. ### Patches The issue has been patched in version 0.8.1, by checking the length of messages after they are processed by incoming extensions. All users should upgrade to this version. ### Workarounds No known workarounds exist. ### Acknowledgements This issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-104957 advisory.

    ### Impact

    If this library is used in tandem with the `permessage-deflate` extension, a     WebSocket server or client can be made to accept messages that are larger than     the configured maximum message size. This is because this limit is checked     against the message frames' length headers, which give the size of the     compressed data, not the size after decompression. This can lead to applications     accepting larger messages than expected and exceeding their intended resource     usage.

    ### Patches

    The issue has been patched in version 0.8.1, by checking the length of messages     after they are processed by incoming extensions. All users should upgrade to     this version.

    ### Workarounds

    No known workarounds exist.

    ### Acknowledgements

    This issue was discovered and reported by Pranjali Thakur, DepthFirst Security     Research Team.

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:

  - ### Impact If this library is used in tandem with the `permessage-deflate` extension, a WebSocket server
    or client can be made to accept messages that are larger than the configured maximum message size. This is
    because this limit is checked against the message frames' length headers, which give the size of the
    compressed data, not the size after decompression. This can lead to applications accepting larger messages
    than expected and exceeding their intended resource usage. ### Patches The issue has been patched in
    version 0.8.1, by checking the length of messages after they are processed by incoming extensions. All
    users should upgrade to this version. ### Workarounds No known workarounds exist. ### Acknowledgements
    This issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.
    (CVE-2026-54464)

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

  - ### Impact If this library is used in tandem with the `permessage-deflate` extension, a WebSocket server     or client can be made to accept messages that are larger than the configured maximum message size. This is     because this limit is checked against the message frames' length headers, which give the size of the     compressed data, not the size after decompression. This can lead to applications accepting larger messages     than expected and exceeding their intended resource usage. ### Patches The issue has been patched in     version 0.8.1, by checking the length of messages after they are processed by incoming extensions. All     users should upgrade to this version. ### Workarounds No known workarounds exist. ### Acknowledgements     This issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.
    (CVE-2026-54464)

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

ID	Name	Product	Family	Type	Severity
341374	Unity Linux 20.1070e Security Update: rubygem-websocket-driver (UTSA-2026-104957)	Nessus	Unity Linux Local Security Checks	Local	medium
446030	SCA: security update for websocket-driver (GHSA-33ph-fccm-39pj)	Tenable Cloud Security	SCA Checks	Local	medium
446030	SCA: security update for websocket-driver (GHSA-33ph-fccm-39pj)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
327774	Linux Distros Unpatched Vulnerability : CVE-2026-54464	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-54464

medium

Tenable Plugins

medium

medium

medium

medium