Malicious Code Vulnerability in node-calculator-40ed Package

node-calculator-40ed Updated 24 Dec 2025

Summary

23/12/2025
CRITICAL
No i
Critical
Not published

MAL-2025-192829: Malicious code in node-calculator-40ed (npm). Affects node-calculator-40ed versions 5.0.0 – 6.0.0. No fix is published. How to fix ↓

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Background

The node-calculator-40ed package is an npm library designed for performing basic arithmetic calculations. It provides a simple interface for users to execute mathematical operations such as addition, subtraction, multiplication, and division. However, this package has been identified to contain malicious code that poses significant security risks to applications utilizing it.

Vulnerability Detail

The vulnerability stems from the presence of malicious code within the node-calculator-40ed package, specifically in versions 5.0.0 and 6.0.0. This code can potentially execute harmful operations, compromising the integrity and security of the applications that depend on it. The malicious behavior may lead to unauthorized access, data breaches, or other detrimental effects on the system.

How To Fix

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

npm uninstall node-calculator-40ed

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 node-calculator-40ed package from your project until a secure version is released. You can do this by running the command: npm uninstall node-calculator-40ed.

Conclusion

The node-calculator-40ed package has a critical vulnerability due to the presence of malicious code in specific versions. It is crucial for developers to update or remove this package to safeguard their applications from potential threats. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.

See every vulnerability recorded for node-calculator-40ed →

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FAQ

It is an npm library used for performing basic arithmetic calculations.

Versions 5.0.0 and 6.0.0 are known to contain malicious code.

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

Consider removing the package from your project as a temporary measure until a secure version is available.

The vulnerability was identified by ReversingLabs.

How To Fix

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

npm uninstall node-calculator-40ed

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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