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Dev.to
7/18/2026
Your AWS account is one misconfiguration away from being a public file server

Your AWS account is one misconfiguration away from being a public file server

Short summary

S3 bucket misconfigurations are the most common security threat for small SaaS teams on AWS — more than zero-days or nation-states. The author built SentryHive, a free scanner that identifies public buckets, stale IAM credentials, over-permissioned Lambda functions, and exposed RDS instances, then provides deployable IAM policy fixes. The article walks through setting up a read-only cross-account IAM role and interpreting scan results.

  • •S3 misconfigurations are the top security risk for small AWS teams
  • •SentryHive, Prowler, and ScoutSuite can scan for common misconfigurations
  • •Fixes include deny policies, credential rotation, and scoping down IAM permissions

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