Improper Access Control in Keycloak Allows Privilege Escalation
CVE-2026-11577

7.2HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Build Of Keycloak
Red Hat Data Grid 8
Red Hat Jboss Enterprise Application Platform 8
Red Hat Jboss Enterprise Application Platform Expansion Pack
Vendor
CVE Published:
8 June 2026

What is CVE-2026-11577?

A vulnerability has been identified in Keycloak where a limited administrator can exploit an improper access control flaw in the POST /admin/realms/{realm}/partialImport endpoint. This weakness enables the limited admin to circumvent Fine-Grained Admin Permissions (FGAP), allowing them to escalate their privileges to that of a full realm administrator by erroneously importing users with realm-admin role mappings. This could result in unauthorized access to sensitive realm configurations and operations, compromising the overall security of the system.

References

https://access.redhat.com/security/cve/CVE-2026-11577
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2459993
issue-trackingx_refsource_REDHAT
https://github.com/keycloak/keycloak/issues/9387

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Andrii Ilin (10Guards) for reporting this issue.
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