Malicious Code Detected in urlssser Package - PyPI Vulnerability Alert

urlssser Updated 19 Jan 2026

Summary

18/01/2026
CRITICAL
No i
Critical
Not published

MAL-2026-326: Malicious code in urlssser (PyPI). Affects urlssser versions 0.1 – 0.2. 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 MarkAI Find prospects already talking about the problem you solve AI watches the communities your customers use to find qualified prospects, then alerts you when a conversation is worth joining. See MarkAI

Background

The urlssser package, available on the Python Package Index (PyPI), is designed to assist users in URL shortening and management. However, it has been identified as part of a malicious campaign, specifically the '2025-10-speedd-testing-bot', which exploits its functionality to execute harmful scripts. This vulnerability poses significant risks to users who may unknowingly install the package, leading to potential data theft and system compromise.

Vulnerability Detail

The vulnerability originates from the urlssser package being uploaded as part of a malicious campaign. Although the package itself does not contain direct malicious code, it serves as a helper for further infection stages. The campaign employs techniques such as typosquatting, where users may mistakenly install the malicious package instead of a legitimate one. Once installed, it downloads and executes remote malicious scripts, potentially leading to unauthorized access and control over the user's system.

How To Fix

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

pip uninstall urlssser

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, users can monitor their systems for any unauthorized activities and ensure that they do not install packages from unverified sources. Additionally, employing security tools to scan for malicious scripts can help mitigate risks.

Conclusion

The urlssser package has been identified as part of a malicious campaign that poses significant risks to users. It is crucial to uninstall the package and monitor for any unauthorized activities. Utilizing tools like Vulert can help keep your software secure against such vulnerabilities.

See every vulnerability recorded for urlssser →

Share this vulnerability

FAQ

urlssser is a Python package designed for URL shortening and management, but it has been compromised in a malicious campaign.

You can use tools like Vulert to monitor and alert for open-source vulnerabilities in your software. Check your application against the vulnerability using the Vulert playground.

Immediately uninstall the urlssser package using 'pip uninstall urlssser' and avoid using it until a safe version is released.

The risks include unauthorized access to your system, data theft, and potential control over your device by malicious actors.

Always verify the source of packages before installation, use security tools to scan for vulnerabilities, and keep your software updated.

How To Fix

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

pip uninstall urlssser

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