One Goal, Many Commands: Characterizing Denylist Fragility in AI Agents
The adoption of AI agents is increasing rapidly. Terminal AI agents, i.e., AI agents that run in terminal environments, are a widely used type of AI agents. Terminal AI agents rely heavily on shell command execution to interact with the host systems. They adopt a three-list command-gating mechanism to mitigate security risks introduced by command execution, with denylists serving as the load-bearing component. However, modern operating systems often ship a large, ever-expanding set of shell commands with complex functionalities. Our observation is that even a built-in denylist of Claude Code, well-maintained by its developers, can overlook bypass commands that invalidate its effectiveness...
| Authors | Chuyang Chen, Zhiqiang Lin |
|---|---|
| Primary category | cs.CR |
| Published | 14 June 2026 |
| Last updated at source | 20 June 2026 |
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