Risky Bulletin Newsletter
April 15, 2026
Risky Bulletin: Malicious LLM proxy routers found in the wild
Presented by
News Editor
A recently published academic paper has studied the emerging ecosystem of LLM routers, a type of proxy that sits between AI agents and the AI provider to help with load-balancing and cost tracking and limiting.
The research team tested 28 paid routers available on marketplaces like Taobao, Xianyu, and on Shopify-hosted storefronts, as well as 400 free routers available on GitHub and other places.
The study searched for multiple suspicious behaviors, such as modifying the response to inject commands, using a delay/trigger mechanism to hide future bad commands behind a history of clean operations, accessing credentials that pass through them, and using evasion techniques to thwart analysts.