Amazon S3 now applies two new default bucket security settings by automatically enabling S3 Block Public Access and disabling S3 access control lists (ACLs) for all new S3 buckets. This change was first announced on December 13, 2022, began deploying on April 5, 2023, and is now applied to all AWS Regions. To learn more about the change, read Heads-Up: Amazon S3 Security Changes Are Coming in April of 2023 in the AWS News Blog and Default access settings for new S3 buckets FAQ in the S3 User Guide.