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Perplexity's Comet AI browser could expose your data to attackers - here's how


An attacker could use prompt injecting to include malicious commands with your own prompts, says Brave, potentially gaining access to your personal data.

Agentic browsing mode carries some risks, as the browser can read and send emails or view sensitive and confidential data on a website. August 20, 2025: Public disclosure of vulnerability details (Update: on further testing after this blog post was released, we learned that Perplexity still hasn't fully mitigated the kind of attack described here. "As AI assistants gain more powerful capabilities, indirect prompt injection attacks pose serious risks to web security."

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