Author

Wu-Jie Xiong

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Preprint Aug 2026

Reachability-Based Capability Confinement for LLM Agents under Indirect Prompt Injection

SkillGuard is presented, a harness-level enforcement layer that treats this event as contamination and restricts future capabilities to disconnect the resulting state from deployer-defined forbidden states and preserves substantially more capabilities than binary restriction at the same attack success rate.

Wu-Jie Xiong, Rabimba Karanjai, Yang Lu et al. · 0 citations

Review Aug 2026

When Agents Act on Web3: An Attack-Surface Survey of MCP, Skills, and Tool Calling

This survey argues that four properties of that layer (irreversibility, signing authority, continuous autonomy, and sequence-level composition) qualitatively change the threat model, turning the recoverable failures of generic agent security into a standing, irreversible loss.

Rabimba Karanjai, Yang Lu, Nour Diallo et al. · 0 citations