CVE-2026-40295 Devise: Open Redirect via Unvalidated `request.referrer` in Timeoutable Session Timeout Handler

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 FailureAppredirecturl method returns request.referrer — the HTTP Referer header, which is attacker-controllable — without validation for any non-GET...