Critical Malicious Code Vulnerability in @zalastax/nolb-parsek Package

@zalastax/nolb-parsek Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-12993: Malicious code in @zalastax/nolb-parsek (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The @zalastax/nolb-parsek package is an npm library designed for parsing data in a specific format. It is utilized in various applications for its efficiency and ease of integration. However, this package has been identified to contain malicious code, posing significant risks to applications that depend on it.

Vulnerability Detail

The vulnerability in the @zalastax/nolb-parsek package arises from the presence of malicious code that can compromise the security of applications using this library. This code can lead to unauthorized access, data breaches, or other malicious activities. The issue was introduced in version 0 and affects all subsequent versions, making it critical for users to take immediate action.

How To Fix

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

npm uninstall @zalastax/nolb-parsek

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 replace the functionality provided by the @zalastax/nolb-parsek package with alternative libraries that offer similar features without the associated risks. Consider using well-known and trusted packages instead.

Conclusion

The discovery of malicious code in the @zalastax/nolb-parsek package highlights the importance of vigilance in managing open-source dependencies. Users must take immediate action to mitigate risks by removing the package and monitoring their applications for any suspicious activity.

See every vulnerability recorded for @zalastax/nolb-parsek →

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FAQ

The malicious code can potentially allow unauthorized access to sensitive data or execute harmful actions within the application.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check your application without needing to sign up.

If immediate removal is not possible, consider isolating the affected components and monitoring for any unusual activity until you can implement a permanent fix.

While specific exploits have not been publicly disclosed, the presence of malicious code inherently poses a risk of exploitation.

Regularly check for updates in your dependencies and utilize tools like Vulert to receive real-time alerts for any vulnerabilities.

How To Fix

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

npm uninstall @zalastax/nolb-parsek

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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