Regulatory Watch  /  United States (federal)  /  Court ruling
Low impactCourt rulingDecided

Ninth Circuit rules Perplexity AI’s Comet browser not liable under CFAA

The Ninth Circuit Court of Appeals held that Perplexity AI’s Comet browser does not violate the Computer Fraud and Abuse Act because the tool itself does not access Amazon’s servers; users do. The court rejected Amazon’s claim that Perplexity was unauthorized to access user accounts. The decision notes that agentic AI presents novel legal issues but the assistant is considered a tool, not a person, for statutory purposes.

Why it matters: The ruling limits CFAA liability for AI‑driven web tools, clarifying that developers are not criminally responsible for user‑initiated access.

Summary generated from the sources below. Check the primary source before relying on it; this is not legal advice.

Sources
Appeals Court Agrees with EFF that Building a Web Browser Doesn’t Violate the CFAA
EFF updates · primary source · Aug 4, 2026
Details
JurisdictionUnited States (federal)
CourtNinth Circuit Court of Appeals
LawComputer Fraud and Abuse Act
StatusDecided
PublishedAugust 4, 2026
Effectivenot stated
OrganisationsPerplexity AI, Amazon
Topicscybersecurity, ai governance, access