A2A Trust Exploitation
Multi-Agent SecurityDescription
Agents implicitly trust messages from other agents without authentication or authorisation verification. Enables lateral movement, privilege escalation, and systematic bypass of controls by compromising one agent in the mesh.
Low-privilege agent impersonates the orchestrator to issue instructions to a high-privilege financial agent.
Credit-scoring and trading models trained on pre-2020 data experienced documented failures during COVID-19 market dislocation, with banks reporting elevated model-risk losses and regulators issuing guidance on pandemic-era model validation. Distribution shift is a well-confirmed root cause cited in multiple post-mortems by financial institutions and their prudential supervisors.
Primary mitigations
- Cryptographic agent authentication
- agent identity verification per message
- zero-trust agent-to-agent communication
- message signing and validation.
Detection signals
A2A Trust Validation Coverage; unauthenticated agent message rate.