Perplexity’s Comet Browser Screenshot Feature Vulnerability Let Attackers Inject Malicious Prompts

A new vulnerability in Perplexity’s Comet AI browser allows attackers to inject malicious prompts through seemingly innocuous screenshots. Disclosed on October 21, 2025, this flaw builds on earlier concerns about prompt injection in agentic browsers, AI-powered tools that act on users’ behalf. The discovery highlights ongoing risks in these emerging technologies, where hidden instructions can […]

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