Malicious Code Detected in node-calculator-8b5f Package - Security Alert

node-calculator-8b5f Updated 19 Nov 2025

Summary

17/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-190533: Malicious code in node-calculator-8b5f (npm). Affected versions are not published. No fix is published. How to fix ↓

Free scan

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.

Check my app free

No signup required · Results in about 60 seconds

Upload your dependency manifest or SBOM

Drag & drop your file here or

Java Javascript PHP Python Go Rust Ruby Dart C/C++ Elixir CycloneDX SPDX

Upload a supported dependency manifest or SBOM. No installation or source-code access required.

See supported files and SBOM formats
SBOM sbom.json · bom.json · bom.xml · *.spdx.json · *.cdx.json · *.cdx.xml
Java pom.xml · gradle.lockfile · buildscript-gradle.lockfile
Javascript package-lock.json · yarn.lock · pnpm-lock.yaml
PHP composer.lock
Python poetry.lock · requirements.txt · Pipfile.lock
Go go.mod
Rust Cargo.lock
Ruby Gemfile.lock
Dart pubspec.lock
C/C++ conan.lock
Elixir mix.lock
Enter your work email to receive your report link.

Verify your email to view the full report and start 30 days of continuous monitoring. No credit card required.

Sponsored Devnack Mobile apps built by Devnack Design, build and launch iOS and Android apps with a senior product team. From idea to store release Start a project

Background

The node-calculator-8b5f package is an npm library designed for performing basic arithmetic calculations. It is commonly used in JavaScript applications for its simplicity and ease of integration. However, this package has been identified to contain malicious code, posing significant security risks to applications that utilize it.

Vulnerability Detail

The vulnerability originates from the presence of malicious code within the node-calculator-8b5f package. This code can potentially compromise the security of applications that depend on it, leading to unauthorized access, data breaches, or other malicious activities. The malicious code was identified by Amazon Inspector, 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 node-calculator-8b5f

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 immediate updating is not feasible, consider removing the node-calculator-8b5f package from your project and replacing it with a trusted alternative for arithmetic calculations. This can be done by uninstalling the package with the command: 'npm uninstall node-calculator-8b5f'.

Conclusion

The discovery of malicious code in the node-calculator-8b5f package underscores the importance of vigilance when using third-party libraries. It is essential to regularly update dependencies and monitor for vulnerabilities to protect your applications from potential threats.

See every vulnerability recorded for node-calculator-8b5f →

Share this vulnerability

FAQ

node-calculator-8b5f is an npm package used for basic arithmetic operations in JavaScript applications.

The specific nature of the malicious code has not been disclosed, but it poses risks such as unauthorized access and data breaches.

You can use Vulert, which monitors open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.

Consider removing the node-calculator-8b5f package and replacing it with a trusted alternative until you can update.

The vulnerability was reported by Amazon Inspector, a service that identifies security issues in software packages.

How To Fix

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

npm uninstall node-calculator-8b5f

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 →

Subscribe to Vulert on Telegram
Daily digest of new CVEs, critical and high severity, affected packages and fixes — plus a weekly roundup.
Join the channel →
Help improve this record
Report an issue or send feedback