EMBRACE research breaks the built-in browsers of Cursor, Copilot, Codex, VS Code and Claude Desktop
Published Oct 29, the research shows a booby-trapped page got Cursor's agent to run a host command (patched Oct 1), and a local HTML file in Codex, VS Code or Claude Desktop could read and exfiltrate files across the disk, with Copilot spoofing the address bar (fixed in 1.1.29). Codex and VS Code were still unpatched at publication, so be careful opening untrusted HTML in their built-in browsers (Help Net Security).