What It Is, Not What It Says: Securing Agentic Browsing Interactions with Web Semantics

Reported by arXiv cs.CR (Umar Iqbal)

Summary by Cyber Security News19 Oct 2026, 06:00 CEST

About this summary. This is a short, independently written summary of an article first published by arXiv cs.CR. Cyber Security News did not report or verify the underlying story. Read the original: https://arxiv.org/abs/2610.22697

arXiv:2610.22697v1 Announce Type: new Abstract: AI agents increasingly browse the web on users' behalf, yet they consume webpages as screenshots or text, exposing their LLMs to unvetted third-party content. Browsers enforce semantics under which what an element can do depends on what it is and where it comes from, not on what it says. Agents flatten these semantics, so injected text can persuade the LLM to exercise the user's authority for content that has none.

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