On August 31, 2026, Brad Fitzpatrick released tailcat, an open-source Go package and CLI that exposes Tailscale’s data plane — WireGuard, NAT traversal, and DERP — with no account, no IP addresses, and no control plane. Use it to connect two isolated machines, or hand an AI agent a disposable connection, with no root access.

On August 6, 2026, researcher Malcolm Stagg presented NatJack at Black Hat USA — a new attack class that manipulates NAT connection state to hijack active TCP sessions, spoof DNS responses, expose mapped ports, and exhaust NAT tables. Windows, Linux, and consumer routers are all vulnerable — because the flaw is in the concept of NAT itself, not any one implementation.