https://miscreants.github.io/blog.trailofbits.com/authors/lucas-bourtoule/Recent content in Lucas Bourtoule on The Trail of Bits BlogHugoen-usTue, 13 Jan 2026 00:00:00 -0500https://miscreants.github.io/blog.trailofbits.com/2026/01/13/lack-of-isolation-in-agentic-browsers-resurfaces-old-vulnerabilities/Tue, 13 Jan 2026 07:00:00 -0500https://miscreants.github.io/blog.trailofbits.com/2026/01/13/lack-of-isolation-in-agentic-browsers-resurfaces-old-vulnerabilities/We exploited a lack of isolation mechanisms in multiple agentic browsers to perform attacks ranging from the dissemination of false information to cross-site data leaks. These attacks resurface decades-old patterns of vulnerabilities that the web security community spent years building effective defenses against.