Microsoft researchers have detailed an exploit chain, named AutoJack, that turns an AI browsing agent into a delivery vehicle for remote code execution.
Steer the agent to load an attacker's web page, and that page's JavaScript can reach a privileged local service on the same machine and spawn a process on the host.
No credentials, no sign-in screen, and no further user interaction once the agent loads the page. The attacker only has to get the agent to open it, and a planted link, a URL field, or a prompt injection will do.
The flaw sits in AutoGen Studio, the open-source prototyping interface for Microsoft Research's AutoGen multi-agent framework. This is not a bug that hits everyone who installs the package, and the packaging detail is worth getting right.
A plain pip install autogenstudio pulls the current stable release, 0.4.2.2, the build Microsoft inspected, and it has no Model Context Protocol (MCP) route at all.
