Critical Malicious Code Vulnerability in @uc-platform/user-service-client-ts Package

Summary

18/03/2026
CRITICAL
No i
Critical
Not published

MAL-2026-1641: Malicious code in @uc-platform/user-service-client-ts (npm). Affects @uc-platform/user-service-client-ts versions 99.99.9. No fix is published. How to fix ↓

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Background

The @uc-platform/user-service-client-ts package is a client library designed for user service interactions in TypeScript applications. It provides essential functionalities for user management, including authentication and user data handling. However, this package has been identified with a critical vulnerability that exposes applications to potential malicious code execution.

Vulnerability Detail

The vulnerability stems from malicious code embedded within the @uc-platform/user-service-client-ts package, specifically in version 99.99.9. This malicious code can lead to unauthorized access, data breaches, or other harmful actions within applications that utilize this package. The origin of this vulnerability has been traced back to a compromised version of the package, which poses significant risks to developers and users alike.

How To Fix

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

npm uninstall @uc-platform/user-service-client-ts

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, you may consider removing the @uc-platform/user-service-client-ts package from your project until a secure version is released. This can be done using the command: npm uninstall @uc-platform/user-service-client-ts. Additionally, you can monitor your dependencies using tools like Vulert, which can alert you in real-time for open-source vulnerabilities.

Conclusion

The @uc-platform/user-service-client-ts package has been identified with a critical vulnerability due to malicious code. It is essential for developers to take immediate action by updating or removing the package to safeguard their applications. Utilizing tools like Vulert can help in monitoring and managing vulnerabilities effectively.

See every vulnerability recorded for @uc-platform/user-service-client-ts →

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FAQ

The vulnerability involves malicious code that can compromise the security of applications using this package.

You can use the Vulert playground at Vulert Scanner to check if your application is affected without any signup.

If immediate updates are not possible, consider removing the package temporarily and using alternative solutions.

Yes, Vulert can monitor your package-lock.json file to alert you in real-time for any open-source vulnerabilities.

You can find more information on the package's official repository or documentation site.

How To Fix

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

npm uninstall @uc-platform/user-service-client-ts

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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