Living definition
What is WebAuthn Level 3?
Authentication & Access (Passkeys / FIDO)Security & Identity
- As of
- 2026-10-01
- Revision
- 2026-10-06.1
- Method
- v1.4.0
Definition
The term, in context
AI-assisted draft · approved dataset
WebAuthn Level 3 is the third revision of the Web Authentication (WebAuthn) specification, the browser API through which sites register and use public-key credentials such as passkeys in place of passwords. It refines the earlier revisions with additions covering creation hints, richer client capability and extension queries, and clarified cross-origin behavior, while remaining compatible with authenticators built for the specification's previous levels.
Live readiness status
Status as of the current dateline
AI-assisted assembly · derived results
As of 2026-10-01, verified readiness is 35 (claimed 75, reported 55, gap 40) — Critical evidence strength; current signals suggest Adopt Level 3 features individually with configuration testing.
The readiness fact belongs to the canonical Readiness Verdict for WebAuthn Level 3.
Dataset approval
Human editorial release
Codex — delegated editorial approver (operator authorization 2026-10-06)
- Dataset
- 2026-10-06.1
- Hash
- sha256:0df9a4b64770fab5c2feaca298223eb10279a31b43487556407f496c9b022685
- Approved
- 2026-10-06