Malicious Code Detected in Teaser-Nav Package (19.9.5)
Summary
MAL-2026-615: Malicious code in teaser-nav (npm). Affects teaser-nav versions 19.9.5. No fix is published. How to fix ↓
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Background
Teaser-nav is an npm package designed to facilitate the creation of dynamic navigation elements in web applications. It allows developers to easily implement navigation features that enhance user experience. However, version 19.9.5 of this package has been identified as malicious, posing significant security risks to applications that utilize it.
Vulnerability Detail
The vulnerability in the teaser-nav package arises from its communication with a domain linked to malicious activities and the execution of commands that are associated with harmful behavior. This can lead to unauthorized access, data breaches, or the execution of arbitrary code within the affected applications, potentially compromising the integrity and security of the entire system.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall teaser-navIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary workaround, you can remove the teaser-nav package from your project until a secure version is confirmed. Use the following command to uninstall it: npm uninstall teaser-nav.
Conclusion
The teaser-nav package version 19.9.5 has been identified as malicious, posing serious security risks to applications. It is essential to update to a patched version or remove the package to safeguard your application. Utilize tools like Vulert for real-time monitoring of vulnerabilities in your software.
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FAQ
Teaser-nav is an npm package used for creating dynamic navigation elements in web applications.
Version 19.9.5 communicates with a domain associated with malicious activities and executes harmful commands.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If immediate updates are not possible, consider removing the package from your project as a temporary measure.
You can visit the OpenSSF Package Analysis project or use tools like Vulert to monitor and alert for open-source vulnerabilities.
