Access - AAGUID restrictions and AMR matching for independent MFA
Cloudflare Access now supports AAGUID-based authenticator restrictions to limit enrollment to specific WebAuthn devices, and AMR claim matching to skip redundant MFA prompts when the identity provider has already performed equivalent authentication. This reduces friction for users while maintaining security controls.
Independent MFA in Cloudflare Access now supports two additional organization-level controls:
- Restrict authenticators by AAGUID — Limit enrollment to a specific set of WebAuthn authenticators using their AAGUID ↗. This is useful for organizations that require FIPS-validated security keys or company-issued hardware. AAGUIDs are managed through a new List type.
- AMR matching — Skip the independent MFA prompt when the identity provider has already performed an equivalent MFA. Access reads the
amrclaim defined in RFC 8176 ↗ and matches supported values such ashwk,otp, andfptto the authenticator types allowed on the application or policy. This prevents users from having to complete MFA twice when their identity provider already enforces it.
To get started, refer to Independent MFA.
Source: original entry ↗
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