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Agent Security & SandboxingAnthropic

Anthropic reports prompt injection defense results (Claude for Chrome)

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Prompt injection defense results (Claude for Chrome)

Why it matters

About 1% attack success rate against adaptive attacks. Stated explicitly that no browser agent is immune and that it does not claim the problem is solved

Source — Primary sources first; secondary reports are labelled “Press”

Officialanthropic.comhttps://www.anthropic.com/research/prompt-injection-defenses

Added in Week 35, 2026 · See that week

On the map — ㉒ Agent Security line

  1. Previous stop‘Lethal trifecta’
  2. This record · stopClaude for Chrome
  3. Next stopCisco finds 26% of 31,000 agent skills have at least one vulnerability
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Same week

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Nearby on the same axis

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