Malicious Code Vulnerability in constant-values Package

constant-values Updated 19 Mar 2026

Summary

18/03/2026
CRITICAL
No i
Critical
Not published

MAL-2026-1699: Malicious code in constant-values (npm). Affects constant-values versions 100.0.0. No fix is published. How to fix ↓

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Background

The constant-values package is a utility in the npm ecosystem that provides a way to define and manage constant values in JavaScript applications. It is often used by developers to ensure that certain values remain unchanged throughout the application lifecycle. However, this package has been identified to contain malicious code, posing significant risks to applications that utilize it.

Vulnerability Detail

The vulnerability in the constant-values package stems from the introduction of malicious code that can compromise the integrity of applications using this package. This code can lead to unauthorized access, data breaches, or other malicious activities. The issue was identified in version 100.0.0 of the package, and it is crucial for developers to be aware of the potential ramifications of using this compromised version.

How To Fix

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

npm uninstall constant-values

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

As a temporary workaround, you can remove the constant-values package from your project if it is not essential. Alternatively, consider using a different package that provides similar functionality without the associated risks.

Conclusion

The discovery of malicious code in the constant-values package highlights the importance of maintaining secure dependencies in software development. Developers are urged to update their packages promptly and utilize tools like Vulert to monitor for vulnerabilities.

See every vulnerability recorded for constant-values →

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FAQ

The constant-values package is an npm utility that helps manage constant values in JavaScript applications.

The malicious code in the constant-values package can lead to unauthorized access and potential data breaches in your application.

You should update the constant-values package to a secure version immediately to mitigate the risks associated with this vulnerability.

Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in your software using just the package-lock.json file.

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

How To Fix

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

npm uninstall constant-values

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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