Security & Threat Intelligence · 07.08.2026, 16:55 UTC
Securing your Amazon S3 buckets: Identifying and remediating over-permissioned access
| Schweregrad | info |
|---|---|
| Kategorie | Security & Threat Intelligence |
| Quelle | AWS Security Blog ↗ |
| Veröffentlicht | 07.08.2026 UTC |
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Misconfigured Amazon Simple Storage Service (Amazon S3) buckets can expose your data to unauthorized access. Without proactive review, S3 bucket policies or Access Control Lists (ACLs) configured with broad access may go unnoticed in your environment. In this post, you learn how to identify and fix over-permissioned S3 buckets across your AWS environment, along with best practice recommendations and automation opportunities to help you prevent security gaps. This post provides a workflow framework and methodology recommendations for your security team to adapt. The focus of this post is on the what and why rather than a prescriptive implementation. You will need to customize the approach based on your organization’s requirements and existing security tooling. This solution is intended for security engineers, cloud architects, and DevOps teams managing single- or multiple-account AWS environments with Amazon S3 workloads that require access management. Prerequisites Before you begin, make sure you have the following in place: Ensure you have an AWS account with permissions to create AWS Lambda functions, AWS Identity and Access Management (IAM) roles, and Amazon Simple Notification Service (Amazon SNS) topics. You will also need the AWS Command Line Interface (AWS CLI) or AWS SDK installed locally. For multi-account environments, AWS Organizations should already be configured. Basic familiarity with IAM policies and Python will help you customize the solution to your needs. Solution overview This solution uses a five-phase workflow diagram to …