Malicious code in ultralib (PyPI)

ultralib Updated 02 Oct 2025

Summary

24/02/2023
CRITICAL
No i
Critical
Not published

MAL-2023-7757: Malicious code in ultralib (PyPI). 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

ultralib is a Python package available on PyPI. It is used for XYZ functionality and is widely used in various projects. The package provides ABC features and is known for its ease of use and performance. However, it has been discovered that a malicious code injection vulnerability exists in ultralib, potentially compromising the security and integrity of systems that use this package.

Vulnerability Detail

The vulnerability in ultralib is a result of a malicious code injection introduced in version 0. The code injection was discovered by the Checkmarx team, who found that nearly 6000 malicious PyPi and NPM packages were published by the EsqueleSquad group. These packages execute spyware and information-stealing malware. The specific impact of this vulnerability on ultralib includes potential data breaches, unauthorized access to sensitive information, and the possibility of further compromise of the affected systems.

How To Fix

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

pip uninstall ultralib

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 workaround, if updating ultralib is not immediately possible, it is recommended to temporarily remove or disable the package from the project until a fixed version can be obtained. This can be done by modifying the project's dependencies or removing references to ultralib in the codebase.

Conclusion

In conclusion, ultralib is vulnerable to a malicious code injection that can lead to severe security risks. It is crucial to update to a non-affected version or temporarily remove the package until a fixed version is available. Regularly monitoring and updating dependencies is essential to ensure the security of your software. For further support on vulnerability remediation, you can contact Checkmarx at supplychainsecurity@checkmarx.com.

See every vulnerability recorded for ultralib →

Share this vulnerability

FAQ

You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability. Simply provide your Pipfile.lock file, and Vulert will analyze it for any open-source vulnerabilities, including this one.

No, only versions 0 and later are affected by the malicious code injection. It is recommended to update to a version that is not affected.

The potential consequences include data breaches, unauthorized access to sensitive information, and further compromise of the affected systems. It is important to address this vulnerability promptly to mitigate these risks.

This vulnerability was discovered by the Checkmarx team, who identified the malicious code injection in ultralib.

If you have any further questions or need assistance with vulnerability remediation, you can contact Checkmarx at supplychainsecurity@checkmarx.com or visit their website at https://bit.ly/checkmarx-malicious-packages.

How To Fix

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

pip uninstall ultralib

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