Realm-admin escalation via protocol mapper type swap
Published Aug 5, 2026 · Updated Aug 5, 2026
Policy bypass in Red Hat build of Keycloak 26.4 and 26.6 allows remote authenticated users to gain realm-administrator access via DCR. In ProtocolMappersClientRegistrationPolicy.testMappers, an update compares only the incoming and stored configuration maps and does not verify that protocolMapper is unchanged. Client-registration privileges are required; an attacker can retain the configuration, switch to a hardcoded-role mapper, and inject realm-admin into issued tokens, enabling full realm control.
Summary
What happened
Policy bypass in Red Hat build of Keycloak 26.4 and 26.6 allows remote authenticated users to gain realm-administrator access via DCR. In ProtocolMappersClientRegistrationPolicy.testMappers, an update compares only the incoming and stored configuration maps and does not verify that protocolMapper is unchanged. Client-registration privileges are required; an attacker can retain the configuration, switch to a hardcoded-role mapper, and inject realm-admin into issued tokens, enabling full realm control.
The record
- CVE
- CVE-2026-15572
- Published
- Aug 5, 2026
- Updated
- Aug 5, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat build of Keycloak
- Classifications
- CWE-843, T1134
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 5, 2026CVE publishedPublication date reported by the CVE source.
- Aug 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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