All news with #comet tag

Comet AI Browser's Embedded API Permits Device Access

⚠️ Security firm SquareX disclosed a previously undocumented MCP API inside the AI browser Comet that enables embedded extensions to execute arbitrary commands and launch applications — capabilities mainstream browsers normally block. The API can be triggered covertly from pages such as perplexity.ai, creating an execution channel exploitable via compromised extensions, XSS, MITM, or phishing. SquareX highlights that the analytics and agentic extensions are hidden and cannot be uninstalled, leaving devices exposed by default.

Spoofed AI Sidebars Can Trick Atlas and Comet Users

⚠️ Researchers at SquareX demonstrated an AI Sidebar Spoofing attack that can overlay a counterfeit assistant in OpenAI's Atlas and Perplexity's Comet browsers. A malicious extension injects JavaScript to render a fake sidebar identical to the real UI and intercepts all interactions, leaving users unaware. SquareX showcased scenarios including cryptocurrency phishing, OAuth-based Gmail/Drive hijacks, and delivery of reverse-shell installation commands. The team reported the findings to vendors but received no response by publication.