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AWS Security Blog · August 19, 2026

Propagate user authorization context in AI agents with Amazon Bedrock AgentCore

guide Agent SecurityAI EngineeringAI Compliance
Why it matters

AWS demonstrates three ways to carry user identity through an AgentCore application: STS session tags for DynamoDB authorization, metadata filters for Bedrock Knowledge Bases, and RFC 8693 on-behalf-of exchange for external services. The design keeps enforcement in infrastructure and downstream systems instead of asking the model to filter results.

My takeaway: Validate the user token before agent code runs and propagate a short-lived, audience-bound identity to every tool. Prefer downstream row- or resource-level enforcement over query wording, use separate knowledge bases where metadata filters are not a sufficient boundary, avoid broad service accounts, and log the user, assumed role, scope, and object accessed in one trace.
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OWASP GenAI Security Project · guide

OWASP Top 10 for Agentic Applications for 2026

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