The AI Agent Got the Right Answer. It Still Took the Wrong Path.
Researchers describe Convergent Detour Hijacking, an attack in which a single static third party skill steers an agent onto a longer, costlier execution path while leaving task completion intact. In their controlled testbed on DeepSeek V4 Pro, the attacker skill was selected in 80.02 percent of tasks, and among selected runs where both the clean and attacked executions succeeded, tokens rose 66.91 percent. Correct output did not mean the execution path was necessary.
