S3Scanner is a security scanning tool that finds misconfigured S3 buckets across AWS and other S3-compatible cloud storage providers.
The tool addresses the problem of identifying open or improperly secured S3 buckets that expose sensitive data. It works by scanning bucket names against multiple cloud providers, testing all bucket permissions to detect misconfigurations, and reporting which buckets are accessible when they should not be. The scanner supports AWS, DigitalOcean, DreamHost, GCP, Linode, Scaleway, and custom S3-compatible endpoints.
Organizations conducting security assessments, bug bounty hunting, or infrastructure audits should consider this tool. It suits projects that need to validate S3 bucket configurations at scale or integrate scanning into automated workflows. The tool distinguishes itself through multi-threaded scanning for performance, support for numerous S3 providers out of the box, and integration capabilities with Postgres databases and RabbitMQ for large-scale automated scanning operations. Docker support enables easy deployment in containerized environments.
The project shows active maintenance with regular updates and engagement with contributors. Development activity demonstrates responsiveness to user needs and ongoing refinement of the scanning capabilities.
