Confused is a dependency security analysis tool that identifies potential supply chain vulnerabilities by checking for available namespace registrations in public package repositories. The tool analyzes dependency configuration files across multiple programming languages and package managers, including Python requirements.txt files, JavaScript package.json files, PHP composer.json files, and Maven pom.xml files. For each dependency listed in these configuration files, Confused queries the corresponding public package repository (PyPI for Python, npm for JavaScript, Packagist for PHP, and Maven Central for Java) to determine if the package name is available for registration. When a dependency name is not found in the public repository, it indicates a potential security risk where an attacker could register a malicious package with that name, potentially leading to dependency confusion attacks. The tool generates reports identifying all package names that are not found in public repositories, allowing developers and security teams to assess their exposure to supply chain attacks through namespace squatting or typosquatting.