#s3

1. 
   aws

   Cutting the File-Upload Bill: A Cognito + S3 Case Study

   How we swapped a managed file-upload SaaS for a native Cognito Identity Pool + S3 direct-upload pipeline — `${cognito-identity.amazonaws.com:sub}` folder scoping, first-100-GB-free egress, monthly bill down.

   NH Nedim Hadzimahmutovic Aug 24, 2026 · 10 min
2. 
   aws

   How a CloudFront Custom Error Page Leaked JWTs to S3: A Case Study

   A pen-test curl found CloudFront forwarding `Authorization` headers to the S3 error-page bucket, where S3 reflected every JWT back in its XML error response. Two lines of Terraform closed it across sixteen distributions.

   NH Nedim Hadzimahmutovic Aug 13, 2026 · 12 min

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