Malicious Code Vulnerability in marshel Package: Remote Control Threat

marshel Updated 19 Jan 2026

Summary

18/01/2026
CRITICAL
No i
Critical
Not published

MAL-2026-325: Malicious code in marshel (PyPI). Affects marshel versions 0.3. 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 Mobile apps built by Devnack Design, build and launch iOS and Android apps with a senior product team. From idea to store release Start a project

Background

The marshel package, available on PyPI, is purportedly a speed testing tool or a typosquatted Telegram library. It is designed to facilitate interactions with the Telegram messaging platform. However, this package has been identified as containing malicious code that allows for remote control of the user's computer, posing significant security risks.

Vulnerability Detail

The marshel package has been compromised through typosquatting, where a malicious actor has created a deceptive version of the package. This version downloads and executes a remote malicious script, effectively turning the user's machine into a remote access trojan (RAT). The origins of this vulnerability trace back to the package's malicious campaign, which aims to exploit unsuspecting users by masquerading as a legitimate tool.

How To Fix

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

pip uninstall marshel

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, avoid using the marshel package and consider alternative libraries that provide similar functionality without the associated risks. Always verify the authenticity of packages before installation.

Conclusion

The marshel package poses a significant security risk due to its malicious code that allows for remote control of affected systems. Users are advised to uninstall the package immediately and consider using alternative solutions. Regular monitoring of dependencies with tools like Vulert can help prevent future vulnerabilities.

See every vulnerability recorded for marshel →

Share this vulnerability

FAQ

The marshel package is a Python library that was marketed as a speed testing tool or a Telegram library but has been found to contain malicious code.

The vulnerability allows the malicious code to execute remote scripts, potentially giving attackers control over your computer.

You should immediately uninstall the marshel package using 'pip uninstall marshel' and check your system for any unusual activities.

Always verify the source of packages before installation, and consider using tools like Vulert to monitor for vulnerabilities in your dependencies.

Vulert is a monitoring tool that alerts you in real-time for open-source vulnerabilities in your software. You can check if your application is affected by vulnerabilities using the Vulert playground without needing to sign up.

How To Fix

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

pip uninstall marshel

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