Malicious Code Injection in tiny_blackbird_z3n: A Threat to npm Packages

tiny_blackbird_z3n Updated 27 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-97019: Malicious code in tiny_blackbird_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓

Free scan

Check if this vulnerability affects your application

Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.

Check my app free

No signup required · Results in about 60 seconds

Upload your dependency manifest or SBOM

Drag & drop your file here or

Java Javascript PHP Python Go Rust Ruby Dart C/C++ Elixir CycloneDX SPDX

Upload a supported dependency manifest or SBOM. No installation or source-code access required.

See supported files and SBOM formats
SBOM sbom.json · bom.json · bom.xml · *.spdx.json · *.cdx.json · *.cdx.xml
Java pom.xml · gradle.lockfile · buildscript-gradle.lockfile
Javascript package-lock.json · yarn.lock · pnpm-lock.yaml
PHP composer.lock
Python poetry.lock · requirements.txt · Pipfile.lock
Go go.mod
Rust Cargo.lock
Ruby Gemfile.lock
Dart pubspec.lock
C/C++ conan.lock
Elixir mix.lock
Enter your work email to receive your report link.

Verify your email to view the full report and start 30 days of continuous monitoring. No credit card required.

Sponsored Lume, the Habilume companion Habilume Habit tracker with a companion that grows with you Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent. App Store Google Play

Background

The tiny_blackbird_z3n package is part of the npm ecosystem, which is widely used for JavaScript package management. This package, like many others, is intended to facilitate the development and deployment of applications by providing reusable code. However, it has been identified as part of a malicious campaign that exploits npm's publishing mechanisms, leading to potential security risks for developers and their applications.

Vulnerability Detail

The vulnerability in tiny_blackbird_z3n stems from its association with a malicious campaign that floods the npm registry with derivative packages. These packages contain scripts designed to automatically modify package.json files, removing private flags, altering version numbers, and generating random package names. This behavior not only pollutes the npm registry but can also compromise the integrity of applications relying on these packages, leading to reputational damage for developers and potential security breaches.

How To Fix

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

npm uninstall tiny_blackbird_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 measure, avoid using the tiny_blackbird_z3n package and consider using alternative packages that provide similar functionality without the associated risks. Regularly audit your project's dependencies to ensure no malicious packages are included.

Conclusion

The tiny_blackbird_z3n package poses a significant security risk due to its malicious code injection capabilities. Developers are urged to remove this package from their projects and utilize monitoring tools like Vulert to stay informed about potential vulnerabilities in their dependencies.

See every vulnerability recorded for tiny_blackbird_z3n →

Share this vulnerability

FAQ

tiny_blackbird_z3n is an npm package that has been identified as part of a malicious campaign targeting the npm registry.

The vulnerability can lead to the injection of malicious code into your application, potentially compromising its security and integrity.

You should uninstall the package immediately using the command npm uninstall tiny_blackbird_z3n.

You can use tools like Vulert, which monitors your package-lock.json file for open-source vulnerabilities in real-time.

Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.

Sponsored Lume, the Habilume companion Habilume Habit tracker with a companion that grows with you Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent. App Store Google Play

How To Fix

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

npm uninstall tiny_blackbird_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 →

Subscribe to Vulert on Telegram
Daily digest of new CVEs, critical and high severity, affected packages and fixes — plus a weekly roundup.
Join the channel →
Help improve this record
Report an issue or send feedback