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Area

core

Describe the bug

When a https url is configured for hostname-admin and requests are http (e.g. from a edge proxy server terminating TLS) requests to /admin/ return a 404.

This was introduced with https://github.com/keycloak/keycloak/issues/38463. The logic comparing requestUrl and adminUrl should be relaxed.

Version

26.2.0

Regression

[x] The issue is a regression

Expected behavior

Redirect to Admin Console is performed when /admin is accessed via the Admin Hostname - a mismatch in schemes http/https should be allowed.

Actual behavior

404 response when request is http, and hostname-admin is https.

How to Reproduce?

I'm seeing the issue with only the hostname configured - maybe this is internally setting admin to hostname + "/admin"?

./bin/kc.sh start-dev \
--hostname=https://banana.russdev

Access /admin/ with a host header configured - and on http. Observe a 404.

$ curl -v --header 'Host: banana.russdev'  localhost:8080/admin/
< HTTP/1.1 404 Not Found

Anything else?

No response