On September 9, 2026, FedRAMP opened two Requests for Comment that start Phase 4:
- RFC-0033 — 20x Phase 4 Development Tracks for 20x Class D
- RFC-0034 — Technical Advisory Group Changes
Both close October 9, 2026.
This is not a Marketplace listing day. It is the planning window for High. Class B and Class C pipelines opened August 31. Phase 4 is how FedRAMP takes 20x to Class D — the former High baseline — and how it starts writing rules for self-hosted and hybrid-hosted services that Phase 1–3 left behind.
Providers who want a seat in the Class D pilot have one hard gate: a CR26-compliant FedRAMP 20x Class C Certification before December 1, 2026.








