Critical Malicious Code Vulnerability in @voiceflow/fetch Package
Summary
MAL-2025-191348: Malicious code in @voiceflow/fetch (npm). Affects @voiceflow/fetch versions 1.11.1 – 1.11.2. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The @voiceflow/fetch package is a JavaScript library used for making HTTP requests in applications built with Voiceflow. It is designed to simplify the process of fetching data from APIs, providing developers with an easy-to-use interface. However, this package has been compromised, making it susceptible to severe security threats.
Vulnerability Detail
The vulnerability originates from a malicious payload introduced by the Sha1-Hulud: The Second Coming NPM worm. This worm is capable of stealing tokens and credentials from users and publishing them to GitHub. It can also propagate itself to other NPM packages owned by the user and establish persistence through GitHub actions. Additionally, there is a risk that the worm may destroy the user's home directory, leading to significant data loss.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall @voiceflow/fetchIf 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, consider removing the @voiceflow/fetch package from your project until a secure version is released. You can do this by executing the following command: npm uninstall @voiceflow/fetch.
Conclusion
The @voiceflow/fetch package has been compromised by a malicious worm that poses significant security risks. It is essential for users to update to the latest version and monitor their applications for vulnerabilities to ensure the safety of their data and systems.
See every vulnerability recorded for @voiceflow/fetch →
FAQ
The malicious code is designed to steal sensitive information such as tokens and credentials and can also propagate itself to other packages.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check if your application is affected without needing to sign up.
If you have installed the compromised version, it is crucial to uninstall it immediately and update to a secure version as soon as it is available.
Failure to address this vulnerability can lead to unauthorized access to sensitive information, data loss, and potential damage to your system.
Regularly monitor your dependencies for vulnerabilities using tools like Vulert, and keep your packages updated to the latest secure versions.
