Malicious Code Vulnerability in chai-as-prop: A Critical Security Concern
Summary
MAL-2026-1670: Malicious code in chai-as-prop (npm). Affects chai-as-prop versions 5.1.7. No fix is published. How to fix ↓
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Background
chai-as-prop is an npm package that extends the Chai assertion library, allowing developers to assert properties of objects in a more intuitive manner. It is widely used in testing JavaScript applications, providing a simple and effective way to validate object properties. However, this package has been found to contain malicious code, posing a significant risk to applications that rely on it.
Vulnerability Detail
The vulnerability in chai-as-prop stems from the introduction of malicious code that can compromise the integrity of applications using this package. This code could potentially allow unauthorized access to sensitive data, execute arbitrary commands, or manipulate application behavior. The malicious code was identified in version 5.1.7 of the package, and it is crucial for developers to be aware of the risks associated with using this compromised version.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall chai-as-propIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
If you are unable to update the package immediately, consider removing chai-as-prop from your project and replacing it with an alternative assertion library that does not have known vulnerabilities. Additionally, you can monitor your dependencies for vulnerabilities using tools like Vulert, which can alert you to any issues in real-time.
Conclusion
The discovery of malicious code in the chai-as-prop package highlights the importance of maintaining secure dependencies in software development. Developers should take immediate action to update or replace the affected package to safeguard their applications from potential threats.
See every vulnerability recorded for chai-as-prop →
FAQ
chai-as-prop is an npm package that extends the Chai assertion library, allowing for more intuitive property assertions in JavaScript testing.
The malicious code can compromise application integrity, potentially allowing unauthorized access to sensitive data or executing arbitrary commands.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
Consider removing chai-as-prop from your project and using an alternative assertion library. Additionally, monitor your dependencies for vulnerabilities using tools like Vulert.
Using Vulert, you can monitor and receive alerts for open-source vulnerabilities in your software in real-time, ensuring you are always informed.
