Devise is an authentication solution for Rails based on Warden. In versions 5.0.3 and below, when the Timeoutable module is enabled in Devise, the FailureApp#redirect_url method returns request.referrer — the HTTP Referer header, which is attacker-controllable — without validation for any non-GET request that results in a session timeout. An attacker who hosts a page with an auto-submitting cross-origin form can cause a victim with an expired Devise session to be redirected to an arbitrary external URL. This contrasts with the GET timeout path (which uses server-side attempted_path) and Devise's own store_location_for mechanism (which strips external hosts via extract_path_from_location), both of which are protected; only the non-GET timeout redirect path is unprotected. Expired-session users can be silently redirected from the trusted app domain to attacker-controlled URLs, enabling phishing and malware delivery while bypassing browser warnings. Note: Rails' built-in open-redirect protection does not mitigate this issue. Devise::FailureApp is an ActionController::Metal app with its own isolated copy of the relevant redirect configuration, so config.action_controller.action_on_open_redirect = :raise (and the older raise_on_open_redirects setting) do not reach it. This issue has been fixed in version 5.0.4.

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

  - Devise is an authentication solution for Rails based on Warden. In versions 5.0.3 and below, when the     Timeoutable module is enabled in Devise, the FailureApp#redirect_url method returns request.referrer  the     HTTP Referer header, which is attacker-controllable  without validation for any non-GET request that     results in a session timeout. An attacker who hosts a page with an auto-submitting cross-origin form can     cause a victim with an expired Devise session to be redirected to an arbitrary external URL. This     contrasts with the GET timeout path (which uses server-side attempted_path) and Devise's own     store_location_for mechanism (which strips external hosts via extract_path_from_location), both of which     are protected; only the non-GET timeout redirect path is unprotected. Expired-session users can be     silently redirected from the trusted app domain to attacker-controlled URLs, enabling phishing and malware     delivery while bypassing browser warnings. Note: Rails' built-in open-redirect protection does not     mitigate this issue. Devise::FailureApp is an ActionController::Metal app with its own isolated copy of     the relevant redirect configuration, so config.action_controller.action_on_open_redirect = :raise (and the     older raise_on_open_redirects setting) do not reach it. This issue has been fixed in version 5.0.4.
    (CVE-2026-40295)

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

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

  - Devise is an authentication solution for Rails based on Warden. In versions 5.0.3 and below, when the
    Timeoutable module is enabled in Devise, the FailureApp#redirect_url method returns request.referrer — the
    HTTP Referer header, which is attacker-controllable — without validation for any non-GET request that
    results in a session timeout. An attacker who hosts a page with an auto-submitting cross-origin form can
    cause a victim with an expired Devise session to be redirected to an arbitrary external URL. This
    contrasts with the GET timeout path (which uses server-side attempted_path) and Devise's own
    store_location_for mechanism (which strips external hosts via extract_path_from_location), both of which
    are protected; only the non-GET timeout redirect path is unprotected. Expired-session users can be
    silently redirected from the trusted app domain to attacker-controlled URLs, enabling phishing and malware
    delivery while bypassing browser warnings. Note: Rails' built-in open-redirect protection does not
    mitigate this issue. Devise::FailureApp is an ActionController::Metal app with its own isolated copy of
    the relevant redirect configuration, so config.action_controller.action_on_open_redirect = :raise (and the
    older raise_on_open_redirects setting) do not reach it. This issue has been fixed in version 5.0.4.
    (CVE-2026-40295)

ID	Name	Product	Family	Severity
316558	Linux Distros Unpatched Vulnerability : CVE-2026-40295	Nessus	Misc.	medium
441543	SCA: security update for devise (GHSA-jp94-3292-c3xv)	Tenable Cloud Security	SCA Checks	medium
441543	SCA: security update for devise (GHSA-jp94-3292-c3xv)	Tenable Self-Hosted Container Security	SCA Checks	medium

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CVE-2026-40295

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