Executive Summary

CVE-2026-30289 is an arbitrary file overwrite vulnerability in the Tinybeans Private Family Album App version 5.9.5-prod. The flaw exists in the app's file import process, where insufficient security validation allows an attacker to manipulate both the filename and content of imported files.

By exploiting path traversal techniques, a malicious actor can overwrite critical internal files within the app's storage. This can lead to severe consequences such as arbitrary code execution, exposure of sensitive information, denial of service, and privilege escalation.

The attack can be triggered with minimal user interaction, potentially automatically when the victim opens a malicious app. Overwritten files may also redirect sensitive data to attacker-controlled domains.

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Impact Analysis

This vulnerability can have multiple serious impacts on users of the Tinybeans Private Family Album App.

• Arbitrary code execution: Attackers can run malicious code within the app environment.
• Information exposure: Sensitive data stored by the app can be accessed or leaked.
• Denial of service: Overwriting critical files can cause the app to malfunction or fail to launch.
• Privilege escalation: Attackers may gain higher access rights within the app or device.

Overall, this vulnerability can compromise the security and privacy of your data and disrupt normal app functionality.

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Detection Guidance

Detection of CVE-2026-30289 involves monitoring the Tinybeans Private Family Album App (version 5.9.5-prod) for signs of arbitrary file overwrites during the file import process.

Since the vulnerability exploits path traversal to overwrite sensitive internal files, detection can include checking for unexpected changes to critical files within the app's storage directories.

Commands to detect suspicious file modifications might include using file integrity monitoring tools or commands such as:

• On a Unix-like system, use 'find' to locate recently modified files in the app's directory, e.g., `find /path/to/tinybeans/app/storage -type f -mtime -1` to find files modified in the last day.
• Use 'diff' or checksum tools like 'sha256sum' to compare current files against known good baselines.
• Monitor network traffic for unusual connections to suspicious domains such as 'www.attacker.com' which may indicate data exfiltration.

Because the attack can be triggered automatically with minimal user interaction, monitoring app behavior and file system changes is critical.

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Mitigation Strategies

Immediate mitigation steps for CVE-2026-30289 include:

• Avoid using the vulnerable version 5.9.5-prod of the Tinybeans Private Family Album App until a patch or update is released.
• Restrict or monitor file import operations within the app to prevent malicious files from being processed.
• Implement file integrity monitoring to detect unauthorized changes to critical internal files.
• Educate users to avoid opening or installing untrusted applications that could exploit this vulnerability.
• Monitor network traffic for connections to suspicious domains such as 'www.attacker.com' and block such traffic if detected.

Ultimately, applying an official security patch from Tinybeans USA Ltd. once available is essential to fully remediate the vulnerability.

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Compliance Impact

The arbitrary file overwrite vulnerability in Tinybeans Private Family Album App allows attackers to overwrite critical internal files, potentially leading to arbitrary code execution or exposure of sensitive information.

Exposure of sensitive information and unauthorized code execution can compromise the confidentiality and integrity of user data, which may result in non-compliance with data protection regulations such as GDPR and HIPAA.

Since the vulnerability can lead to information exposure and redirection of sensitive data to attacker-controlled domains, it poses a risk to maintaining the privacy and security controls required by these standards.

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