Malicious Code Vulnerability in @angjlar/core Package
Summary
MAL-2026-17534: Malicious code in @angjlar/core (npm). Affects @angjlar/core versions 22.2.1. No fix is published. How to fix ↓
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Background
The @angjlar/core package is a malicious npm package that impersonates the legitimate @angular/core package. It aims to deceive developers into installing it by mimicking the original package's metadata, such as its description, author, and repository URL. This package is designed to execute arbitrary code on the installer's machine, posing a significant security risk.
Vulnerability Detail
The vulnerability arises from the postinstall lifecycle script in the @angjlar/core package's package.json file, which executes a command to fetch and run JavaScript code from an external source (gitflic.ru) via curl. This allows the operator of the remote script to execute arbitrary code on the user's machine during the installation process. The malicious nature of this package is highlighted by its impersonation of the legitimate Angular package, targeting developers who may mistype the package name.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall @angjlar/coreIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary measure, avoid using the @angjlar/core package and ensure that your package.json file does not include it. Regularly audit your dependencies to identify any potentially malicious packages.
Conclusion
The @angjlar/core package poses a significant security risk due to its malicious code execution capabilities. Developers should be vigilant in verifying package names and using tools like Vulert to monitor for vulnerabilities. Immediate action is required to remove this package and ensure the integrity of your applications.
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FAQ
The @angjlar/core package is a malicious npm package that impersonates the legitimate @angular/core package, designed to execute arbitrary code on the user's machine.
The vulnerability works by executing a postinstall script that fetches and runs untrusted JavaScript code from an external source, allowing for arbitrary code execution.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. You can check your application using the Vulert playground without any signup.
If you have installed @angjlar/core, you should uninstall it immediately using the command: npm uninstall @angjlar/core and replace it with the legitimate @angular/core package.
Using malicious packages can lead to arbitrary code execution, data breaches, and compromise of your application's security, potentially affecting your users and infrastructure.
