EUVD-2026-41557
GHSA-5qq8-h7qh-phfj
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Network-accessible API with no user interaction, but PR:L is correct as a delegated admin session is required; impact is strictly limited to low confidentiality with no integrity or availability effect.
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
1DescriptionCVE.org
A flaw was found in the Fine-Grained Admin Permissions (FGAP) v2 implementation within Keycloak's administrative services. When FGAP v2 is enabled, the system fails to properly filter child groups based on the caller's specific permissions when requested through a parent group. This allows a delegated administrator to view details of child groups they are not authorized to access directly, including group names, paths, and custom attributes.
AnalysisAI
Unauthorized child group disclosure in Red Hat Build of Keycloak's Fine-Grained Admin Permissions v2 (FGAP v2) exposes group names, paths, and custom attributes to delegated administrators who lack direct authorization over those child groups. When FGAP v2 is enabled and a delegated admin queries child groups through a parent group endpoint, the system omits the required per-permission filter, returning records that should be outside the caller's scope. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Fine-Grained Admin Permissions v2 (FGAP v2) must be explicitly enabled in the Keycloak realm - this is a non-default feature that requires deliberate administrative activation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 4.3 (Medium) is driven by the vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, indicating network-reachable exploitation with low complexity, but requiring an authenticated low-privileged user (a delegated administrator account). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker holding a delegated administrator account in a Keycloak realm - one explicitly scoped to manage only a subset of groups - authenticates to the Keycloak Admin REST API and issues a GET request for child groups under a parent group they are permitted to see. Because FGAP v2 fails to apply per-child permission filtering in this code path, the response includes child groups outside the delegated admin's authorized scope, revealing their names, hierarchical paths, and any custom attributes stored at the group level. … |
| Remediation | No specific patched release version has been confirmed in the available intelligence data - the CPE entry spans all versions without an explicit fix version boundary, and no vendor advisory citing an exact corrective release was identified. … Detailed patch versions, workarounds, and compensating controls in full report. |
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