AIKIDO-2026-836209
keycloak-services is vulnerable to Privilege Escalation
77
High Risk
This Affects:
keycloak-servicesTL;DR
The GroupResource.addChild endpoint in the Admin REST API is missing an authorization check when reparenting groups. With Fine-Grained Admin Permissions v2 enabled, a user who manages a single low-privilege group can move a highly privileged group underneath it. Because group permissions are inherited hierarchically, this grants management and password-reset rights over the privileged group's members and can lead to full realm takeover. The fix enforces authorization on the reparent operation.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and Fine-Grained Admin Permissions v2 is enabled.
Background info
keycloak-services is vulnerable to Privilege Escalation in versions 1.0.1.Final - 26.6.3.
How to fix this
Upgrade the org.keycloak:keycloak-services library to the patch version.
Links
GitHub Release
Other
access.redhat.com/errata/RHSA-2026:30049access.redhat.com/errata/RHSA-2026:30050access.redhat.com/errata/RHSA-2026:30083access.redhat.com/errata/RHSA-2026:30084access.redhat.com/security/cve/CVE-2026-9099bugzilla.redhat.com/show_bug.cgi?id=2480182security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9099.json
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SOC 2Compliant
ISO 27001Compliant