Werkzeug is a comprehensive WSGI web application library. Prior to version 3.1.5, Werkzeug's safe_join function allows path segments with Windows device names that have file extensions or trailing spaces. On Windows, there are special device names such as CON, AUX, etc that are implicitly present and readable in every directory. Windows still accepts them with any file extension, such as CON.txt, or trailing spaces such as CON. This issue has been patched in version 3.1.5.

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

  - Werkzeug is a comprehensive WSGI web application library. Prior to version 3.1.5, Werkzeug's safe_join
    function allows path segments with Windows device names that have file extensions or trailing spaces. On
    Windows, there are special device names such as CON, AUX, etc that are implicitly present and readable in
    every directory. Windows still accepts them with any file extension, such as CON.txt, or trailing spaces
    such as CON. This issue has been patched in version 3.1.5. (CVE-2026-21860)

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

  - Werkzeug is a comprehensive WSGI web application library. Prior to version 3.1.5, Werkzeug's safe_join     function allows path segments with Windows device names that have file extensions or trailing spaces. On     Windows, there are special device names such as CON, AUX, etc that are implicitly present and readable in     every directory. Windows still accepts them with any file extension, such as CON.txt, or trailing spaces     such as CON. This issue has been patched in version 3.1.5. (CVE-2026-21860)

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

ID	Name	Product	Family	Type	Severity
464273	Echo: werkzeug: security update to 2.2.3+echo.1	Tenable Cloud Security	Echo Local Security Checks	Local	medium
464273	Echo: werkzeug: security update to 2.2.3+echo.1	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
437464	SCA: security update for Werkzeug (GHSA-87hc-h4r5-73f7)	Tenable Cloud Security	SCA Checks	Local	medium
437464	SCA: security update for Werkzeug (GHSA-87hc-h4r5-73f7)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
282536	Linux Distros Unpatched Vulnerability : CVE-2026-21860	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-21860

medium

Tenable Plugins

medium

medium

medium

medium

medium