Malicious Code Injection in Vellutts Package - PyPI Vulnerability

vellutts Updated 22 Oct 2026

Summary

21/10/2026
CRITICAL
No i
Critical
Not published

MAL-2026-18149: Malicious code in vellutts (PyPI). Affects vellutts versions 0.1.0. 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

Vellutts is a Python package available on the Python Package Index (PyPI) that is designed for voice synthesis profiles. It allows users to integrate voice synthesis capabilities into their applications. However, the package has been identified as part of a coordinated campaign that facilitates the execution of malicious code from remote sources, posing significant security risks to users.

Vulnerability Detail

The vulnerability in the Vellutts package stems from its ability to download and execute remote scripts, which can lead to the execution of malicious payloads on the user's system. This behavior is indicative of a broader campaign involving multiple deceptive packages designed to load harmful code. The malicious intent is clear, as it can lead to data theft, unauthorized access, and other forms of exploitation.

How To Fix

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

pip uninstall vellutts

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 Vellutts package until a secure version is released. You can also consider using alternative packages that provide similar functionality without the associated risks.

Conclusion

The Vellutts package has been identified as part of a malicious campaign that poses significant security risks due to its ability to execute remote scripts. Users are advised to uninstall the package and monitor for updates. Utilizing tools like Vulert can help in identifying vulnerabilities in open-source software effectively.

See every vulnerability recorded for vellutts →

Share this vulnerability

FAQ

Vellutts is a Python package designed for voice synthesis, allowing developers to integrate voice capabilities into their applications.

The Vellutts package contains a vulnerability that allows it to download and execute malicious scripts from remote locations.

You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.

If you have the Vellutts package installed, it is recommended to uninstall it immediately and monitor for any updates or patches.

Vulert monitors and alerts users in real-time for open-source vulnerabilities in software by analyzing the Pipfile.lock, ensuring that developers are informed of potential risks.

How To Fix

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

pip uninstall vellutts

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