Critical Malicious Code Vulnerability in @voiceflow/backend-utils Package
Summary
MAL-2025-191334: Malicious code in @voiceflow/backend-utils (npm). Affects @voiceflow/backend-utils versions 5.0.1 – 5.0.2. No fix is published. How to fix ↓
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Background
The @voiceflow/backend-utils package is a utility library designed for backend development within the Voiceflow ecosystem. It provides essential functions and tools that facilitate the creation of voice applications. However, recent findings have revealed that this package has been compromised, making it susceptible to severe security threats.
Vulnerability Detail
The vulnerability stems from a malicious code injection by the Sha1-Hulud: The Second Coming NPM worm. This worm is capable of stealing sensitive tokens and credentials from users and subsequently publishing them to GitHub. Additionally, it can propagate itself to other NPM packages owned by the user and establish persistence through GitHub actions. The malicious payload poses a significant risk as it may also lead to the destruction of the user's home directory, resulting in potential data loss.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall @voiceflow/backend-utilsIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary measure, you can remove the affected package from your project until a secure version is confirmed. Use the following command to uninstall the package: npm uninstall @voiceflow/backend-utils. Additionally, consider using Vulert to monitor your project for vulnerabilities. You can check if your application is affected by this vulnerability using the Vulert playground at https://vulert.com/scanner without any signup.
Conclusion
The @voiceflow/backend-utils package has been compromised by a malicious worm that poses significant security risks. It is essential for users to update to a secure version of the package and consider using tools like Vulert for ongoing vulnerability monitoring. Taking these steps will help protect sensitive information and maintain the integrity of your applications.
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FAQ
The vulnerability involves malicious code that can steal credentials and tokens, potentially leading to unauthorized access to user accounts.
You can use Vulert to monitor your project for vulnerabilities. The Vulert playground allows you to check for affected packages without requiring any signup.
As a workaround, consider uninstalling the affected package until a secure version is available.
Failing to address this vulnerability could lead to unauthorized access to sensitive information and potential data loss.
Yes, using tools like Vulert can help automate the monitoring of your project for open-source vulnerabilities in real-time.
