KeyCloak Admin token always rejected in the testing server #49145

amandaliberaann · 2026-05-08T02:31:32Z

amandaliberaann
May 8, 2026

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Area

No response

Describe the bug

eycloak Admin REST API returns 403 for one realm but works for another using the same master admin token
Hi everyone,

I am stuck with a Keycloak Admin REST API permission issue.

I have one Keycloak server with multiple realms:

local
dev
test
staging
I have an admin user in the master realm. My application logs in through admin-cli using this master admin user, gets an access token, and then calls Admin REST API endpoints to query users from different realms.

For example:

GET /admin/realms/staging/users
GET /admin/realms/test/users
The strange part is:

/admin/realms/staging/users works
/admin/realms/test/users returns 403 Forbidden
Both requests are made using the same master realm admin user and the same admin-cli token flow.

I have already checked the role mappings in the Keycloak Admin Console. For the master admin user, the relevant roles for the test realm appear to be assigned, including:

test-realm → query-users
test-realm → view-users
test-realm → view-realm
test-realm → manage-users
The equivalent roles for staging are also assigned, and staging works correctly.

I also decoded the access token. The decoded token looks the same when used for both staging and test, which makes sense because it is the same master realm admin user and the same login flow. The token issuer is from the master realm, and the authorized party is admin-cli.

However, when calling the users endpoint, only the test realm fails with 403 Forbidden.

I also checked the UI for fine-grained admin permissions, but in my Keycloak Admin Console I do not see an “Admin Permissions” or “Permissions” section under Realm Settings or under the realm-management client. So I am not sure if fine-grained admin permissions are enabled or relevant in this setup.

What I have verified so far:

The realm ID is test, and the API URL uses /admin/realms/test/users.
The same admin user and same token flow works for staging.
The master admin user appears to have test-realm query-users, view-users, view-realm, and manage-users roles assigned.
The equivalent staging-realm roles are assigned, and staging works correctly.
test still returns 403 Forbidden.
I cannot find any fine-grained admin permissions UI in this Keycloak console.
I have compared the decoded tokens used for staging and test, and they appear to be the same.
My question is:

Why would the same master realm admin token be allowed to query users in staging, but return 403 Forbidden for test, even though the corresponding test-realm roles appear to be assigned to the same master admin user?

Version

20

Regression

The issue is a regression

Expected behavior

I expected that the admin token will work in testing server

Actual behavior

the response is always "Admin Forbidden"

How to Reproduce?

N/A

Anything else?

No response

GabrielBBaldez · 2026-06-09T14:47:41Z

GabrielBBaldez
Jun 9, 2026

This is almost always a missing realm-management role, not a token problem.

In Keycloak, a master-realm admin's access to other realms is granted per-realm: the master realm holds a client called <realm>-realm for each realm (so test-realm, staging-realm, …), and each carries roles like view-users, query-users, manage-users. Your token is fine — the 403 means the user behind it has the staging-realm roles but not the test-realm ones.

The built-in admin role in the master realm is a composite that includes the management roles for all realms (and Keycloak adds new realms to it automatically), so a user with the full admin role can administer every realm. A 403 on just one realm means the user doesn't have that full composite — they have a narrower, hand-picked set of *-realm client roles that includes staging-realm but not test-realm.

Fix it in the master realm → Users → your admin user → Role mapping:

assign the admin role for full cross-realm access, or
assign the specific test-realm client roles you need (at least view-users, plus query-users/manage-users if you also list or modify users).

Once test-realm's view-users is mapped, GET /admin/realms/test/users will stop returning 403.

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KeyCloak Admin token always rejected in the testing server #49145

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KeyCloak Admin token always rejected in the testing server #49145

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amandaliberaann May 8, 2026

Before reporting an issue

Area

Describe the bug

Version

Regression

Expected behavior

Actual behavior

How to Reproduce?

Anything else?

Replies: 1 comment

Uh oh!

GabrielBBaldez Jun 9, 2026

amandaliberaann
May 8, 2026

GabrielBBaldez
Jun 9, 2026