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AWS Built a Security Tool. It Introduced a Security Risk
In the previous post of this series, we explored four dangerous misconceptions regarding how to securely set up cross-account access in AWS environments. In this final post of the series, we’ll walk through a real-world case where even AWS got it wrong.
Combined with other misconfigurations - such as exposed IAM roles, secret names, KMS keys, or public S3 buckets - this could help lead to compromise of the organization's most sensitive accounts. They took the issue seriously from the start, worked with us to determine the best way to update the documentation, and delivered a clear and effective fix - ensuring organizations deploying this tool can avoid unintended privilege escalation risks in the future. Throughout this blog series, we explored how trust policy risks can slip into even well-managed AWS environments - sometimes through overlooked technical details, subtle misconceptions, or even official tooling.
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