Malicious Code Injection in sudo-yaml-virtualize-encode-pi Package

Summary

13/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-189730: Malicious code in sudo-yaml-virtualize-encode-pi (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 Devnack Penetration testing for web, API and mobile Manual testing by engineers who build software, not an auditor's checklist. Trusted by teams at Swift and Google Talk to Devnack

Background

The sudo-yaml-virtualize-encode-pi package is part of the npm ecosystem, typically used for YAML processing and virtualization tasks. However, it has been identified as part of a malicious campaign that floods the npm registry with derivative packages. This package's functionality is compromised due to the presence of malicious scripts that manipulate its metadata and behavior.

Vulnerability Detail

The vulnerability originates from a malicious payload embedded within the sudo-yaml-virtualize-encode-pi package. This payload modifies the package.json file to remove private flags, alters version numbers, and generates random package names, leading to the continuous republishing of variants. This behavior not only pollutes the npm registry but also poses a risk to developers who may unknowingly integrate these compromised packages into their projects, potentially leading to security breaches and loss of reputation.

How To Fix

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

npm uninstall sudo-yaml-virtualize-encode-pi

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 sudo-yaml-virtualize-encode-pi package until a secure version is released. Additionally, consider using alternative packages that provide similar functionality without the associated risks.

Conclusion

The sudo-yaml-virtualize-encode-pi package has been identified as containing malicious code that compromises its integrity and poses risks to developers. It is crucial to update or remove this package and to utilize monitoring tools like Vulert to safeguard your projects against future vulnerabilities.

See every vulnerability recorded for sudo-yaml-virtualize-encode-pi →

Share this vulnerability

FAQ

It is an npm package used for YAML processing and virtualization, but it has been compromised with malicious code.

The malicious code modifies your package.json, removes private flags, and can lead to the publication of unauthorized package variants, potentially compromising your project's security.

You should immediately update the package to the latest version or remove it from your project to mitigate any risks.

You can use Vulert, which monitors your package-lock.json for open-source vulnerabilities in real-time. Visit Vulert Scanner to check if your application is affected without needing to sign up.

Regularly audit your dependencies, use tools like Vulert for monitoring, and stay informed about known vulnerabilities in the packages you use.

How To Fix

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

npm uninstall sudo-yaml-virtualize-encode-pi

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