Malicious Code Injection in async-oberon-framework-ursa: npm Package Vulnerability

async-oberon-framework-ursa Updated 25 Nov 2025

Summary

12/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-139632: Malicious code in async-oberon-framework-ursa (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The async-oberon-framework-ursa package is part of the npm ecosystem, designed for asynchronous programming in the Oberon language framework. It is intended to facilitate developers in creating efficient and responsive applications. However, this package has been compromised as part of a larger malicious campaign targeting npm, leading to significant security concerns.

Vulnerability Detail

The vulnerability originates from a malicious payload embedded within the async-oberon-framework-ursa package. This payload modifies the package.json file to remove private flags, alters version numbers, and generates random package names, thereby enabling the automatic publication of derivative packages. This behavior is part of a scheme to inflate developer reputation scores for token rewards associated with the tea.xyz protocol. The ramifications include potential pollution of the npm registry and unauthorized access to sensitive information due to the removal of private flags.

How To Fix

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

npm uninstall async-oberon-framework-ursa

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 async-oberon-framework-ursa package from your project by executing the following command: npm uninstall async-oberon-framework-ursa. This will prevent any malicious code from executing until a secure version is available.

Conclusion

The async-oberon-framework-ursa package has been identified as containing malicious code that poses a significant security risk. It is crucial for developers to take immediate action by updating or removing the package and utilizing tools like Vulert to monitor for vulnerabilities in their applications.

See every vulnerability recorded for async-oberon-framework-ursa →

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FAQ

It is an npm package designed for asynchronous programming in the Oberon language framework.

The malicious code can modify your package.json, remove private flags, and publish unauthorized packages, potentially compromising your application's security.

You should uninstall the package immediately and monitor for any updates or patches that address the vulnerability.

Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time using just your package-lock.json file. Visit Vulert Scanner to check your application.

Regularly audit your dependencies, use tools like Vulert for monitoring, and stay updated with security advisories related to the packages you use.

How To Fix

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

npm uninstall async-oberon-framework-ursa

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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