Executive Summary

CVE-2026-4243 is a vulnerability in version 10.2.25 of the La Nacion App on Android, specifically in the file source/app/lanacion/clublanacion/BuildConfig.java within the app.lanacion.activity component.

The vulnerability involves the manipulation of the argument API_KEY_WEBSOCKET_CV, which leads to unprotected or improper storage of credentials (such as a hardcoded WebSocket API key). This key can be extracted by reverse engineering the app.

An attacker with local access can obtain this key and use it to authenticate to the WebSocket endpoint, potentially establishing multiple connections.

The attack is complex and difficult to execute, but a proof-of-concept exploit is publicly available.

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Impact Analysis

The vulnerability primarily impacts confidentiality by exposing sensitive credentials stored insecurely.

An attacker who obtains the WebSocket API key can authenticate to the WebSocket endpoint and potentially launch distributed denial-of-service (DDoS) attacks by establishing multiple concurrent connections, which may exhaust server resources and disrupt service availability.

However, exploitation requires local access and is considered difficult, limiting the overall risk.

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Compliance Impact

I don't know

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Detection Guidance

This vulnerability involves a hardcoded WebSocket API key in the La Nacion App version 10.2.25 on Android, specifically in the source file BuildConfig.java. Detection would involve inspecting the application binary or source code for the presence of the API_KEY_WEBSOCKET_CV argument or the hardcoded WebSocket API key.

Since the attack requires local access and involves reverse engineering the app, detection on the network level is limited. However, monitoring for unusual WebSocket connections or multiple concurrent connections from the same client to the WebSocket endpoint could indicate exploitation attempts.

Suggested commands or steps include:

• Use APK decompilation tools (e.g., apktool) to extract and inspect the BuildConfig.java or related files for the hardcoded API key.
• On a rooted Android device or emulator, use commands like `strings` on the APK or extracted files to search for API_KEY_WEBSOCKET_CV.
• Monitor network traffic for WebSocket connections using tools like Wireshark or tcpdump filtering on WebSocket ports or endpoints.
• Check for multiple concurrent WebSocket connections from the same source IP, which may indicate exploitation.

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Mitigation Strategies

Immediate mitigation steps are limited due to the nature of the vulnerability involving hardcoded credentials in the application code and the lack of vendor response or official patches.

Recommended actions include:

• Replace or update the affected component or product if a fixed version becomes available.
• Restrict local access to the device or application to prevent attackers from executing the local exploit.
• Monitor and limit WebSocket connections to prevent abuse from multiple concurrent connections using the exposed API key.
• Consider implementing additional network-level protections such as rate limiting or WebSocket authentication mechanisms independent of the hardcoded key.

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