Perplexity Comet Browser Vulnerable To Prompt Injection Exploit

August 26, 2025

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Brave published details about a security issue with Comet, Perplexity’s AI browser, that enables an attacker to inject a prompt into the browser and gain access to data in other open browser tabs.

Comet AI Browser Vulnerability

Brave described a vulnerability that can be activated when a user asks the Comet AI browser to summarize a web page. The LLM will read the web page, including any embedded prompts that command the LLM to take action on any open tabs

According to Brave:

“The vulnerability we’re discussing in this post lies in how Comet…

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Search Engine Journal

Perplexity Comet Browser Vulnerable To Prompt Injection Exploit

August 26, 2025

, Published By Search Engine Journal

Tech

Brave published details about a security issue with Comet, Perplexity’s AI browser, that enables an attacker to inject a prompt into the browser and gain access to data in other open browser tabs.