Forensic Summary
Unit 42 researchers conducted red-team analysis of Amazon Bedrock's multi-agent collaboration framework, demonstrating how attackers can systematically exploit prompt injection to traverse agent hierarchies, extract system instructions, and invoke tools with attacker-controlled inputs. The research reveals that multi-agent architectures introduce compounded attack surfaces through inter-agent communication channels, though no underlying Bedrock vulnerabilities were identified. Properly configured Guardrails and pre-processing stages effectively mitigate the demonstrated attack chains.
Read the full technical deep-dive on Grid the Grey: https://gridthegrey.com/posts/when-an-attacker-meets-a-group-of-agents-navigating-amazon-bedrock-s-multi-agent/
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