Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Manage-realm delegated admin credentials required (PR:H); network REST API vector with no attack complexity; integrity impact only via unauthorized composite role modification.
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Lifecycle Timeline
2DescriptionCVE.org
A flaw was found in the RoleContainerResource component of Keycloak. The issue occurs because certain name-based endpoints in the admin REST API do not properly enforce authorization checks when managing composite roles. This allows a delegated administrator with manage-realm permissions to remove essential child roles from built-in admin roles, potentially disrupting administrative functions within a realm.
AnalysisAI
Broken access control in Keycloak's RoleContainerResource component allows delegated administrators with manage-realm permissions to remove child roles from built-in admin roles via name-based endpoints in the admin REST API that skip proper authorization checks. Affected distributions include Red Hat Build of Keycloak, Red Hat Single Sign-On 7, Red Hat JBoss EAP Expansion Pack, and Red Hat Data Grid 8. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated account that has been granted manage-realm permissions within the target Keycloak realm - this is a delegated administrator role, not a default end-user account. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N) yields a medium score of 4.9, reflecting that exploitation is network-accessible and low-complexity but gated behind high-privilege access - specifically a delegated administrator account with manage-realm permissions. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A delegated administrator with manage-realm permissions authenticates to the Keycloak admin REST API and calls a name-based composite role management endpoint against a built-in admin role. Because the endpoint skips proper authorization checks, the request succeeds and strips one or more essential child roles from the built-in role, degrading the permissions of other realm administrators who depend on that role and potentially locking out administrative operations. … |
| Remediation | No specific patched version is confirmed from the provided input data; the Red Hat security advisory (https://access.redhat.com/security/cve/CVE-2026-16105) and associated Bugzilla ticket (https://bugzilla.redhat.com/show_bug.cgi?id=2501738) should be monitored for errata releases and exact fix versions. … Detailed patch versions, workarounds, and compensating controls in full report. |
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View allSame technique Authentication Bypass
View allVendor StatusVendor
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-51481
GHSA-w32v-46r7-99r7