Analysis · curated 21 Aug 2026
Stop Hijacked AI Agents: AWS Bedrock AgentCore User Context
First reported techupdate24.com
Coverage timeline
Single-source analysis — first reported, latest, and curated coincide.
Why it matters
Prompt-injected AI agents with broad administrative credentials can expose data users were never authorized to see, and this guidance shows defenders how to enforce authorization at the infrastructure layer rather than trusting the LLM's reasoning.
An AWS-based guidance article describes how Amazon Bedrock AgentCore can prevent hijacked AI agents from leaking unauthorized data by moving authorization out of the agent's code into the infrastructure layer, using JWT validation via Cognito, scoped DynamoDB credentials via AssumeRoleWithWebIdentity, department metadata filters for Knowledge Bases, and RFC 8693 On-Behalf-Of token exchange for Salesforce. The approach ensures that even a fully prompt-injected agent remains cryptographically constrained to the requesting user's permissions.