Executive Summary

[{'type': 'paragraph', 'content': 'CVE-2026-4217 is a security vulnerability found in the XREAL Nebula App up to version 3.2.1 on Android. It involves improper handling and storage of sensitive credentials such as accessKey, secretAccessKey, and securityToken within the CloudStoragePlugin.java file of the ai.nreal.nebula.universal component.'}, {'type': 'paragraph', 'content': 'Specifically, a hardcoded AES cryptographic key and initialization vector (IV) are embedded in the source code, allowing attackers with local access to extract these cryptographic parameters and decrypt temporary cloud storage credentials.'}, {'type': 'paragraph', 'content': "This vulnerability leads to unprotected storage of credentials, classified under CWE-256 (plaintext storage of passwords or keys), which can result in unauthorized access to users' cloud-stored files."}, {'type': 'paragraph', 'content': 'Exploitation requires local access and is considered difficult, but a proof-of-concept exploit has been publicly disclosed.'}] [1, 2]

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Impact Analysis

This vulnerability can impact you by compromising the confidentiality of your sensitive cloud storage credentials.

An attacker with local access could extract hardcoded cryptographic keys and decrypt stored credentials, potentially gaining unauthorized access to your cloud-stored files.

Although exploitation is difficult and requires local access, the exposure of these credentials can lead to data leakage and unauthorized system access.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability involves insecure storage of credentials within the Android application XREAL Nebula App up to version 3.2.1, specifically in the file CloudStoragePlugin.java. Detection requires local access to the device or system running the app.'}, {'type': 'paragraph', 'content': 'To detect this vulnerability, you can inspect the application files on the Android device for the presence of hardcoded cryptographic keys or plaintext credentials in the CloudStoragePlugin.java or its compiled equivalents.'}, {'type': 'paragraph', 'content': 'Suggested commands for detection on a rooted Android device or emulator include:'}, {'type': 'list_item', 'content': 'Use adb shell to access the device filesystem.'}, {'type': 'list_item', 'content': "Navigate to the app's directory, for example: `adb shell run-as ai.nreal.nebula.universal ls -l`."}, {'type': 'list_item', 'content': "Extract and inspect the CloudStoragePlugin.java or its compiled classes for hardcoded keys or plaintext credentials using grep or strings commands, e.g.: `adb shell strings /data/data/ai.nreal.nebula.universal/files/CloudStoragePlugin.class | grep -i 'accessKey'`."}, {'type': 'paragraph', 'content': 'Since the vulnerability requires local access and is related to insecure storage, network detection is unlikely to be effective.'}] [1, 2]

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Mitigation Strategies

There are no official patches or mitigations currently available from the vendor for this vulnerability.

Immediate mitigation steps include:

• Restrict local access to devices running the affected XREAL Nebula App versions to trusted users only.
• Avoid using the affected versions (up to 3.2.1) of the XREAL Nebula App on Android until a fixed version is released.
• If possible, replace or uninstall the vulnerable app to prevent exposure of sensitive credentials.
• Monitor for any updates or patches from the vendor and apply them promptly once available.

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