Malicious Code Vulnerability in dotenv-plugin: A Threat to npm Users
Summary
MAL-2026-1716: Malicious code in dotenv-plugin (npm). Affects dotenv-plugin versions 2.3.5 – 3.3.5. 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
dotenv-plugin is a popular npm package that facilitates the loading of environment variables from a .env file into process.env. It is widely used in Node.js applications to manage configuration settings securely. However, this package has recently been identified as containing malicious code, posing significant security risks to users who rely on it for managing sensitive information.
Vulnerability Detail
The vulnerability stems from the presence of malicious code within specific versions of the dotenv-plugin package (2.3.5 and 3.3.5). This code can potentially compromise the integrity of applications using the package, leading to unauthorized access to sensitive data or system manipulation. The malicious code was identified by ReversingLabs, highlighting the importance of scrutinizing third-party packages for security threats.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall dotenv-pluginIf 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, users can remove the dotenv-plugin package from their project until a secure version is confirmed. This can be done using the command: npm uninstall dotenv-plugin. Alternatively, consider using a different package that offers similar functionality without the associated risks.
Conclusion
The discovery of malicious code in the dotenv-plugin package highlights the critical need for developers to monitor their dependencies closely. By updating to the latest version and utilizing tools like Vulert, users can protect their applications from potential security threats.
See every vulnerability recorded for dotenv-plugin →
FAQ
dotenv-plugin is an npm package that loads environment variables from a .env file into process.env, helping developers manage configuration settings securely.
You can check if your application is affected by this vulnerability using Vulert. Simply upload your package-lock.json file to the Vulert playground at Vulert Scanner to receive real-time alerts.
If you are using an affected version (2.3.5 or 3.3.5), you should update to the latest version of dotenv-plugin immediately to mitigate the risk.
The vulnerability was discovered by ReversingLabs, a cybersecurity firm specializing in threat detection and analysis.
Using the affected package can lead to unauthorized access to sensitive data, system manipulation, and other security breaches, which can severely impact your application and its users.
