EUVD-2026-45224Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
API is network-accessible but requires delegated admin credentials (PR:H); impact is role integrity corruption only, with no confidentiality or system availability loss.
Primary rating from Vendor (redhat).
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Lifecycle Timeline
2DescriptionNVD
A flaw was found in the admin REST API of Keycloak, a solution for identity and access management. The issue occurs when a delegated administrator attempts to remove a child role from a composite role. Due to missing authorization checks, an attacker with limited administrative permissions can remove privileged roles they are not authorized to manage, leading to a loss of access for other users and administrators.
AnalysisAI
Unauthorized role removal in Keycloak's admin REST API allows a delegated administrator to strip privileged child roles from composite roles they are not authorized to manage, corrupting the role hierarchy and revoking access for users and administrators who depend on those composite roles. Affected products span Red Hat Build of Keycloak, Red Hat Single Sign-On 7, Red Hat Data Grid 8, and Red Hat JBoss EAP Expansion Pack. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold an authenticated session with delegated administrator privileges within the target Keycloak realm, corresponding to the CVSS PR:H metric - unauthenticated or standard user accounts cannot trigger this flaw. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 4.9 (Medium) is driven primarily by the high privilege requirement (PR:H), which gates exploitation to actors who already hold delegated administrator credentials - a significant real-world barrier. … 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 malicious delegated administrator within a Keycloak realm identifies a composite role used by higher-privileged administrators or service accounts. Without needing to hold management rights over the privileged child role, the attacker issues a DELETE request to the admin REST API endpoint for composite role membership, successfully removing the privileged child role. … |
| Remediation | Consult the Red Hat Security Advisory at https://access.redhat.com/security/cve/CVE-2026-16106 for confirmed patched versions across all affected product lines, as no exact fixed version number is derivable from the provided input data. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-862 – Missing Authorization
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External POC / Exploit Code
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