AWS Security Blog

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Writing IAM Policies: How to Grant Access to an Amazon S3 Bucket

February 20, 2025: This post was republished to reflect the updated least privilege permissions necessary for read-write access to Amazon S3. In this post, we’ll address a common question about how to write an AWS Identity and Access Management (IAM) policy to grant read-write access to an Amazon S3 bucket. Doing so helps you control who can access […]