Interface Anti Patterns: Exploiting Insecure Navigation in 3rd Party Android App Lockers

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Presented at Ekoparty Miami 2026 by

Edward Warren

Interface Anti Patterns: Exploiting Insecure Navigation in 3rd Party Android App Lockers, is a case study of insecure navigation as a recurring weakness in third party Android app locker products. The work analyzes a design anti pattern in which lockers attempt to enforce access control through a PIN or biometric overlay while embedding advertisement driven WebViews within the same authorization surface. This coupling introduces an egress channel from an interface expected to be fail closed. Interactions with embedded advertising can trigger external navigation via ACTION_VIEW intent URIs or deep link associations and may open applications configured as protected such as Chrome depending on the advert linked intent or routing.