Critical Malicious Code Vulnerability in ts-big-number Package
Summary
MAL-2026-1134: Malicious code in ts-big-number (npm). Affected versions are not published. No fix is published. How to fix ↓
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.
No signup required · Results in about 60 seconds
Background
The ts-big-number package is a JavaScript library used in Node.js applications for handling large numbers with precision. It is commonly utilized in financial applications, data analysis, and any scenario where numerical accuracy is paramount. However, this package has been compromised, introducing malicious code that can lead to severe security risks for any system using it.
Vulnerability Detail
The vulnerability stems from the presence of embedded malicious code within the ts-big-number package. This code can fully compromise any computer that has the package installed, allowing unauthorized access to sensitive information such as secrets and keys. The malicious code can persist even after the package is removed, making it crucial for users to take immediate action to secure their systems.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall ts-big-numberIf 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
Currently, there are no workarounds to mitigate the risks associated with the malicious code in the ts-big-number package. The only effective measure is to uninstall the package and secure your system.
Conclusion
The ts-big-number package has been compromised with malicious code, posing significant risks to any system using it. Immediate action is required to uninstall the package and secure sensitive information. Users should also consider alternative libraries for handling large numbers and utilize tools like Vulert for ongoing vulnerability monitoring.
See every vulnerability recorded for ts-big-number →
FAQ
Immediately uninstall the ts-big-number package and rotate any sensitive information stored on the affected system.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without requiring any signup.
No, there is currently no patched version available for the ts-big-number package. It is recommended to find an alternative library.
Failing to remove the package can lead to unauthorized access to sensitive data and full control of your system by malicious actors.
Regularly monitor your dependencies for vulnerabilities using tools like Vulert and keep your packages updated to the latest secure versions.
