Malicious Code Vulnerability in node-calculator-dfd9 Package

node-calculator-dfd9 Updated 24 Dec 2025

Summary

23/12/2025
CRITICAL
No i
Critical
Not published

MAL-2025-192841: Malicious code in node-calculator-dfd9 (npm). Affects node-calculator-dfd9 versions 3.0.0 – 3.0.5. 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 Your last release was probably never penetration tested Manual testing by engineers who build software, not an auditor's checklist. Trusted by teams at Swift and Google Talk to Devnack

Background

The node-calculator-dfd9 package is an npm library designed to perform basic arithmetic calculations. It offers functionalities such as addition, subtraction, multiplication, and division, making it a useful tool for developers needing quick calculations in their applications. However, this package has been identified to contain malicious code, posing significant security risks to users who integrate it into their projects.

Vulnerability Detail

The vulnerability stems from the presence of malicious code within the node-calculator-dfd9 package. This code can potentially compromise the security of applications that utilize this package, leading to unauthorized access, data breaches, or other malicious activities. The issue has been traced back to versions 3.0.0 through 3.0.5 of the package, which were flagged by security researchers from ReversingLabs.

How To Fix

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

npm uninstall node-calculator-dfd9

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-dfd9 package from your project and replacing it with a trusted alternative for arithmetic calculations. You can also monitor your dependencies using tools like Vulert, which can alert you to vulnerabilities in real-time.

Conclusion

The node-calculator-dfd9 package has been found to contain malicious code, posing a serious risk to applications that utilize it. Users are advised to update to the latest version or consider alternative solutions to mitigate potential threats.

See every vulnerability recorded for node-calculator-dfd9 →

Share this vulnerability

FAQ

It is an npm library that provides basic arithmetic functionalities for developers.

Versions 3.0.0 to 3.0.5 are known to contain malicious code.

You can use the Vulert playground at Vulert Scanner to check for vulnerabilities without needing to sign up.

Consider removing the package and using a trusted alternative or monitor your dependencies with Vulert.

The vulnerability was identified by security researchers at ReversingLabs.

How To Fix

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

npm uninstall node-calculator-dfd9

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