Malicious Code Injection in progressive_octopus_z3n: A Threat to npm Ecosystem

progressive_octopus_z3n Updated 27 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-96053: Malicious code in progressive_octopus_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The package 'progressive_octopus_z3n' is part of the npm ecosystem, which is widely used for JavaScript package management. This package has been identified as part of a malicious campaign that aims to exploit the npm registry by flooding it with derivative packages. The malicious nature of this package lies in its ability to manipulate package metadata and publish numerous variants, potentially harming developers' reputations and polluting the registry.

Vulnerability Detail

The vulnerability in 'progressive_octopus_z3n' originates from its association with a token reward campaign that employs autopublish scripts to generate and publish numerous derivative packages with randomized names. This malicious code modifies the package.json file to remove private flags, alters version numbers, and continuously republishes variants, leading to a polluted npm registry and inflated developer reputation scores. The ramifications include potential security risks for developers who unknowingly use these malicious packages, as well as a degradation of trust in the npm ecosystem.

How To Fix

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

npm uninstall progressive_octopus_z3n

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 avoid using the 'progressive_octopus_z3n' package and look for alternative packages that provide similar functionality without the associated risks. Additionally, regularly audit your npm packages using tools like 'npm audit' to identify and mitigate vulnerabilities.

Conclusion

The 'progressive_octopus_z3n' package poses a significant threat due to its malicious code designed to manipulate the npm registry. Developers are advised to remove this package and monitor their applications for vulnerabilities. Utilizing tools like Vulert can help in maintaining the security of your software.

See every vulnerability recorded for progressive_octopus_z3n →

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FAQ

The vulnerability involves malicious code that modifies package metadata and floods the npm registry with derivative packages.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Check your application using the Vulert playground at Vulert Scanner.

You should uninstall the package immediately using 'npm uninstall progressive_octopus_z3n' and consider using alternative packages.

Yes, using this package can lead to security risks and damage to your reputation as a developer due to the pollution of the npm registry.

Regularly audit your dependencies, stay updated on security advisories, and use tools like Vulert to monitor for vulnerabilities.

How To Fix

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

npm uninstall progressive_octopus_z3n

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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