EUVD-2026-44990
GHSA-hp9p-wj8m-c339
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Network-accessible admin API, delegated admin credentials required (PR:L), read-only group attribute disclosure (C:L), no integrity or availability impact.
Primary rating from Vendor (redhat).
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
2DescriptionNVD
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.
AnalysisAI
Group search in Keycloak's administrative API leaks unauthorized parent group details to delegated administrators when Fine-Grained Admin Permissions v2 (FGAP v2) is enabled. A delegated admin with read access to a child group can trigger the flaw simply by searching for that child group, causing the API response to incorrectly return full attribute and configuration data for parent groups they have no authorization to view. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two specific, non-default conditions to be simultaneously true: (1) Fine-Grained Admin Permissions v2 (FGAP v2) must be explicitly enabled in the Keycloak realm - this feature is not enabled by default and requires deliberate administrator configuration; (2) the attacker must authenticate as or control a delegated administrator account that holds at least read permission on at least one child group within the affected hierarchy. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N) scores 4.3 Medium, reflecting a low-privilege network-accessible read-only disclosure with no integrity or availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has compromised or is operating as a legitimate delegated administrator in a Keycloak realm with FGAP v2 enabled issues a group search API request scoped to a child group within their authorized scope. The API response returns the full details of the parent group - including attributes such as LDAP distinguished names, custom group attributes, and administrative configuration - which the delegated admin has no authorization to access. … |
| Remediation | Apply the patch or updated package versions published by Red Hat via the advisory at https://access.redhat.com/security/cve/CVE-2026-15945; exact fix versions are not confirmed in currently available data - consult the Red Hat Customer Portal and Bugzilla entry 2501302 for the specific errata package versions once released. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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