CVE-2026-92862 in Ticket Ryutsu Center
Summary
by MITRE • 10/08/2026
The Android application "Ticket Ryutsu Center" improperly handles custom URL schemes, allowing a malicious application to cause access to an arbitrary website via a crafted Intent.
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Analysis
by VulDB Data Team • 10/08/2026
The vulnerability identified in the Ticket Ryutsu Center Android application stems from an improper implementation of intent filter configurations regarding custom Uniform Resource Scheme handling. In modern mobile operating systems like Android, applications can register for specific URI schemes or actions to enable deep linking and inter-app communication. When developers configure these filters without strict validation mechanisms, they create a pathway for unintended navigation flows that bypass the intended application logic. This specific flaw allows external entities to trigger internal activities within the app by sending crafted Intents containing maliciously constructed URIs. The core technical deficiency lies in the lack of rigorous input sanitization and origin verification when processing these custom scheme requests. Instead of validating whether the incoming request originates from a trusted source or matches expected parameters, the application blindly processes the URI data provided by the caller.
From an operational perspective, this misconfiguration enables a malicious application installed on the same device to redirect users to arbitrary websites without their explicit consent or awareness. An attacker can craft an Intent that mimics legitimate internal navigation requests but points to a phishing domain, malware distribution site, or any other target chosen by the adversary. When the victim interacts with the Ticket Ryutsu Center app, potentially through a notification or background process triggered by the malicious app, the system delivers this crafted intent. The application then executes the navigation command, loading the external website within its own interface or via an implicit browser launch depending on how the activity is configured. This behavior effectively breaks the trust boundary between applications, allowing lower-privilege apps to influence the user experience and potentially expose sensitive session data if cookies are shared across contexts.
This vulnerability aligns with CWE-20 Improper Input Validation as it fails to adequately sanitize or verify external input before processing. Furthermore, it maps directly to MITRE ATT&CK Mobile Attack Technique T1564.003 Hidden Window and potentially T1589 Gather Credentials if the redirected site is designed for credential harvesting. The ability to force navigation to arbitrary sites also relates to CWE-798 Use of Hard-coded Credentials or CWE-200 Exposure of Sensitive Information depending on what data might be transmitted during this unauthorized redirect, particularly if the app maintains active sessions that are exposed via URL parameters or cookies passed to the third-party domain. The impact is significant because it undermines user trust and can lead to account compromise through sophisticated phishing campaigns tailored specifically for users of this ticketing platform.
Mitigation strategies must focus on hardening the application's intent handling mechanisms. Developers should implement strict allow-lists for acceptable URI schemes and domains, ensuring that only pre-approved targets are accessible via deep links. It is critical to validate all incoming Intent data against expected formats and reject any requests that do not match predefined patterns. Additionally, utilizing AndroidX BrowserCompat or explicit Intents rather than implicit ones can reduce the attack surface by preventing other apps from hijacking navigation flows. Implementing signature-based verification for inter-app communication ensures that only trusted applications can trigger specific activities within Ticket Ryutsu Center. Regular security audits and static code analysis focused on intent filter configurations are essential to detect such misconfigurations before deployment, ensuring compliance with secure coding standards like OWASP Mobile Top Ten which explicitly warns against insecure deep linking practices.