Malicious Code Detected in cortex-js-api: A Critical Security Concern

cortex-js-api Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-17598: Malicious code in cortex-js-api (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The cortex-js-api package is a JavaScript library designed for interfacing with the Cortex API, providing developers with tools to integrate its functionalities into their applications. However, recent findings have revealed that this package contains malicious code, posing significant security risks to users and their applications.

Vulnerability Detail

The vulnerability in the cortex-js-api package stems from the inclusion of malicious code that can compromise the integrity of applications utilizing this library. This code may lead to unauthorized access, data breaches, or other harmful actions within the affected systems. The malicious nature of this code was identified by security researchers, highlighting the importance of vigilance when using open-source packages.

How To Fix

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

npm uninstall cortex-js-api

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

If an immediate update is not feasible, consider removing the cortex-js-api package from your project until a secure version is released. You can do this by executing: 'npm uninstall cortex-js-api'. This will prevent any potential exploitation of the malicious code present in the package.

Conclusion

The discovery of malicious code in the cortex-js-api package underscores the importance of regularly monitoring and updating open-source dependencies. By taking proactive measures such as updating or uninstalling vulnerable packages, developers can safeguard their applications against potential threats.

See every vulnerability recorded for cortex-js-api →

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FAQ

cortex-js-api is a JavaScript library that allows developers to interact with the Cortex API, facilitating various functionalities within applications.

The malicious code found in the cortex-js-api package can lead to unauthorized access and potential data breaches, compromising the security of applications using this library.

You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.

If you cannot update the package right away, it is advisable to uninstall the cortex-js-api package to prevent any exploitation of the malicious code.

Using tools like Vulert, which monitors your package-lock.json file, can help you stay informed about open-source vulnerabilities in real-time.

How To Fix

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

npm uninstall cortex-js-api

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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