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Author

Sergio Maffeis

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#artificial intelligence Preprint Oct 2026

Speedbumps: Rejection Attacks on Speculative Decoding

Speculative decoding is a popular technique for increasing the speed and reducing the costs of large language model (LLM) inference by verifying multiple draft tokens in a single target-model forward pass. The resulting benefit depends on the ability of the drafter to approximate the target model's distribution. In thi...

Adam Y. J. Jones, Yuan Yuan, Sergio Maffeis · 0 citations

Breaking MCP with Function Hijacking Attacks: Novel Threats for Function Calling and Agentic Models

A novel function hijacking attack (FHA) that manipulates the tool selection process of agentic models to force the invocation of an attacker-chosen function and is largely agnostic to the context semantics and remains effective across domains and function sets.

Yannis Belkhiter, Giulio Zizzo, Sergio Maffeis et al. · 1 citation

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