OpenID4VCI 1.0 Final Errata, 1.1 Draft and Server-to-Server Specs Diverge in Late 2026

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An analysis of the OpenID4VCI credential issuance standard finds that the approved 1.0 Final text leaves gaps: a Wallet receives the same invalid_grant error for a wrong PIN and an expired Pre-Authorized Code, and the text sets no limit on PIN guesses. Fixes have since appeared in separate documents, including a 1.0 errata set, a 1.1 editor's draft, and a server-to-server draft merged in August 2026, so implementers may follow different texts. The author checked the specification against its repository at a commit dated 27 October 2026 and reviewed the cited pull requests on 15 November 2026. The article also walks through the protocol's roles, endpoints and pre-authorized code flow, including the credential offer format and the token request.

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