Malicious Code Detected in com.unity.modules.jsonserialize - Security Alert

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-17356: Malicious code in com.unity.modules.jsonserialize (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The package com.unity.modules.jsonserialize is part of the Unity framework, which is widely used for game development and interactive content creation. This package is responsible for JSON serialization, allowing developers to easily convert data structures into JSON format. However, it has been identified to contain malicious code, posing a significant security risk to applications utilizing this package.

Vulnerability Detail

The vulnerability arises from the inclusion of malicious code within the com.unity.modules.jsonserialize package. This code can potentially compromise the integrity of applications that depend on it, leading to unauthorized access, data breaches, or other malicious activities. The issue was introduced in version 0 and persists in all subsequent versions, making it critical for developers to address this vulnerability promptly.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall com.unity.modules.jsonserialize

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

Workaround

As a temporary workaround, developers can remove the com.unity.modules.jsonserialize package from their project until a secure version is released. This can be done using the command: npm uninstall com.unity.modules.jsonserialize.

Conclusion

The discovery of malicious code in the com.unity.modules.jsonserialize package highlights the importance of vigilance in software dependencies. Developers are urged to take immediate action to secure their applications by updating or removing the affected package. Utilizing tools like Vulert can further enhance security by providing real-time monitoring for vulnerabilities.

See every vulnerability recorded for com.unity.modules.jsonserialize →

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FAQ

The malicious code can lead to unauthorized access and potential data breaches in applications using this package.

You can use Vulert, which monitors open-source vulnerabilities in your software. Visit Vulert Scanner to check your application without any signup.

Currently, there is no specific patched version mentioned, but it is advisable to keep an eye on the package repository for updates.

Consider removing the package temporarily as a workaround until a secure version is available.

Vulert uses the package-lock.json file to monitor and alert in real-time for open-source vulnerabilities, ensuring your software remains secure.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall com.unity.modules.jsonserialize

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

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