AWS AgentCore Harness Bypass Exposed a Cross-Platform Vulnerability Class in Agent Runtimes

A critical cross-platform vulnerability class affecting agent runtime harnesses was uncovered, including a major flaw in AWS Bedrock AgentCore allowing bypass of model-mediated security controls and unauthorized tool execution. The systemic failure to validate input distinguishes untrusted instructions as authoritative commands, exposing a broad attack surface requiring urgent input validation reforms.

This Wire brief sits within Fusion42's coverage of AI & ML.