Critical Malicious Code Vulnerability in ts-packer Package
Summary
MAL-2026-1047: Malicious code in ts-packer (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-packer package is a tool used in the npm ecosystem for packaging TypeScript files into a single JavaScript file. It is designed to streamline the development process by simplifying the bundling of TypeScript projects. However, this package has been identified as containing malicious code, posing significant security risks to any system where it is installed.
Vulnerability Detail
The vulnerability stems from the presence of embedded malicious code within the ts-packer package. This code can compromise any computer that has the package installed, potentially allowing unauthorized access to sensitive information, including secrets and keys. The origin of this vulnerability is linked to a malicious actor who has manipulated the package to execute harmful actions on affected systems. The ramifications of this vulnerability are severe, as it can lead to full system compromise and data breaches.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall ts-packerIf 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
There are no effective workarounds for this vulnerability other than removing the ts-packer package and ensuring that your system is secure. It is advisable to monitor your system for any unusual activity following the removal of the package.
Conclusion
The discovery of malicious code in the ts-packer package poses a significant threat to systems using this tool. Immediate action is required to remove the package and secure any sensitive information. Utilizing tools like Vulert can help in monitoring for such vulnerabilities in the future.
See every vulnerability recorded for ts-packer →
FAQ
ts-packer is a tool in the npm ecosystem used for bundling TypeScript files into a single JavaScript file, aimed at simplifying the development process.
If you have the ts-packer package installed, your system is considered compromised. You can use Vulert to monitor your application for vulnerabilities without needing to access the code.
Immediately rotate all secrets and keys stored on the affected computer from a different, secure device to prevent unauthorized access.
The best course of action is to remove the ts-packer package and ensure your system is secure. There is no guarantee that removing the package will eliminate all malicious software.
Regularly monitor your dependencies using tools like Vulert, which can alert you to open-source vulnerabilities in real-time without requiring code access.
