Critical Malicious Code Vulnerability in internallib_v23 Package
Summary
MAL-2026-17632: Malicious code in internallib_v23 (npm). Affects internallib_v23 versions 1.0.1. 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 internallib_v23 package is an npm library designed for internal use, providing various functionalities for developers. However, it has been compromised with malicious code that allows unauthorized access to systems. This vulnerability poses a significant risk as it executes a reverse shell command, potentially exposing sensitive data and system integrity.
Vulnerability Detail
The vulnerability originates from a malicious code embedded in the internallib_v23 package. Specifically, the code in index.js exports a function that invokes /bin/bash to curl a remote script from a hardcoded IP address (10.0.19.80:4443) and executes it directly. This creates an interactive reverse shell, allowing attackers to gain control of the affected system without any authentication or user consent. The lack of documentation and the hardcoded nature of the IP address further exacerbate the risk, making it a severe security threat.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall internallib_v23If 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
As a temporary workaround, you can prevent the execution of the malicious code by removing the internallib_v23 package from your project. Additionally, ensure that your environment is secure by monitoring for any unauthorized access attempts.
Conclusion
The internallib_v23 package contains a critical vulnerability due to embedded malicious code that allows for unauthorized system access. It is essential to take immediate action by updating or removing the package to protect your systems from potential threats. Utilizing tools like Vulert can help in monitoring for such vulnerabilities in real-time.
See every vulnerability recorded for internallib_v23 →
FAQ
The vulnerability involves malicious code that creates a reverse shell, allowing unauthorized access to the system.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check your application without any signup.
The consequences include unauthorized access to sensitive data, potential data breaches, and complete control over the affected system by attackers.
Currently, there is no specific patch mentioned for the internallib_v23 package. It is recommended to remove the package or monitor for updates.
If you suspect a compromise, immediately remove the internallib_v23 package, change your passwords, and monitor your systems for any unauthorized access.
