CVE-2026-15945 Keycloak-services: keycloak-services: group hierarchy search discloses hidden parent groups under fgap v2
Delegated administrators can view unauthorized parent group details via search when Fine-Grained Admin Permissions v2 is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-15945?
CVE-2026-15945 is a medium-severity vulnerability in Redhat Build of Keycloak, published on 16 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in the group search functionality of the Keycloak server's administrative API. When Fine-Grained Admin Permissions (FGAP) v2 is enabled, a delegated administrator can bypass access restrictions to view parent groups they are not authorized to see. By searching for a child group they have permission to view, the system incorrectly returns the full details of the parent group in the response, leading to the disclosure of sensitive group attributes and configuration.
Weakness: CWE-639
Which versions are affected by CVE-2026-15945?
1 open source package ship an affected version, including keycloak. It affects 4 products.
| Package | Affected | Fixed in |
|---|---|---|
keycloak Bitnami | All versions | 26.7.2 |
Products include Redhat Build of Keycloak, Redhat Data Grid, Redhat Jboss Enterprise Application Platform Expansion Pack, Redhat Single Sign-On.
How do I fix CVE-2026-15945?
Upgrade keycloak to 26.7.2 or later.
Is CVE-2026-15945 being exploited?
There is no known exploitation of CVE-2026-15945 in the wild and no public exploit code.
Other vulnerabilities in Redhat Build of Keycloak
- CVE-2026-15572 Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation
- CVE-2026-3047 Keycloak SAML Broken has Authentication Bypass by Primary Weakness
- CVE-2026-15573 Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher
- CVE-2026-16102 Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers
- CVE-2026-1609 Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users
Sources
Also known as BIT-keycloak-2026-15945, GHSA-hp9p-wj8m-c339.