UCM masks untrusted webpage content at the DOM level before it reaches a web agent and routes content access through a type-constrained quarantined model, achieving 0% attack success rate against prompt injection while preserving task utility.
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Untrusted Content Masking for Web Agents with Security Guarantees
UCM masks untrusted webpage content at the DOM level before it reaches a web agent and routes content access through a type-constrained quarantined model, achieving 0% attack success rate against prompt injection while preserving task utility.