A vulnerability in virtualenv's app-data seeder allows deletion of arbitrary files outside the intended environment during seed package removal. This occurs because the uninstallation code does not verify that paths derived from distribution metadata remain within the environment, enabling path traversal attacks. The issue requires an existing environment with malicious metadata and user deletion permissions on targeted paths. It was reported by Anthropic's OSS Scanner and affects versions starting from 20.8.1 where the cleanup code was introduced. A fix was implemented in PR #3428 to prevent deletion outside the environment root.