Loopjacking in A2A Implementations: Hijacking Human-in-the-Loop Approvals
A tested LangGraph Agent Server composition let an A2A task update replace a pending action after its approval view was read. See the historical A2A scope gap, the evidence, and the use-time defense.
Summary
The article discusses a vulnerability in A2A implementations where an attacker can hijack approvals by manipulating updates after an action has been viewed. It presents evidence of this security gap and suggests defensive measures to mitigate the risk.
Comments (0 of ) ⌛