Malicious Code Vulnerability in @client-web-next/ab-landing-form Package

Summary

22/09/2026
CRITICAL
No i
Critical
Not published

MAL-2026-16493: Malicious code in @client-web-next/ab-landing-form (npm). Affects @client-web-next/ab-landing-form versions 0.0.1. No fix is published. How to fix ↓

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Background

The @client-web-next/ab-landing-form package is an npm library designed for creating landing forms in web applications. It provides developers with tools to easily integrate forms into their projects, enhancing user engagement and data collection. However, this package has been identified to contain malicious code, posing a significant risk to applications that utilize it.

Vulnerability Detail

The vulnerability stems from the presence of malicious code within the @client-web-next/ab-landing-form package. This code can potentially compromise the security of applications using the package, leading to unauthorized access, data breaches, or other malicious activities. The issue was reported by ReversingLabs and affects version 0.0.1 of the package. Users are advised to be cautious and assess the impact of this vulnerability on their applications.

How To Fix

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

npm uninstall @client-web-next/ab-landing-form

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

As a temporary workaround, you can remove the @client-web-next/ab-landing-form package from your project by executing the following command: npm uninstall @client-web-next/ab-landing-form. This will prevent any potential exploitation of the vulnerability until a fix is provided.

Conclusion

The @client-web-next/ab-landing-form package has been identified to contain malicious code, posing a serious risk to applications that utilize it. Users are strongly advised to update or remove the package to mitigate potential security threats. Regular monitoring using tools like Vulert can help in identifying such vulnerabilities in the future.

See every vulnerability recorded for @client-web-next/ab-landing-form →

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FAQ

The malicious code can perform unauthorized actions, potentially compromising application security and user data.

You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without needing to sign up.

Yes, version 0.0.1 of the @client-web-next/ab-landing-form package is known to contain the malicious code.

If an immediate update is not possible, consider removing the package from your project as a temporary measure.

The vulnerability was reported by ReversingLabs, a cybersecurity firm specializing in threat intelligence.

How To Fix

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

npm uninstall @client-web-next/ab-landing-form

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 →

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