RFC 9110, "HTTP Semantics", June 2022

Errata ID: 7105
Status: Verified
Type: Editorial
Publication Format(s) : TEXT, PDF, HTML
Reported By: Tomoyuki Sahara
Date Reported: 2022-08-26
Verifier Name: Francesca Palombini
Date Verified: 2022-11-01

Section B.1. says:

B.1.  Changes from RFC 2818

   None.

It should say:

B.1.  Changes from RFC 2818

   The use of CN-ID has been deprecated.

Notes:

In RFC2818:

If a subjectAltName extension of type dNSName is present, that MUST
be used as the identity. Otherwise, the (most specific) Common Name
field in the Subject field of the certificate MUST be used.

CN-ID may be used (when a subjectAltName of type dNSName is not present).

In RFC9110:

A reference identity of type CN-ID MUST NOT be used by clients.

CN-ID is not used at all. It is a change from RFC2818.

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