PatchSiren cyber security CVE debrief
CVE-2026-11986 Red Hat CVE debrief
A flaw was found in the admin-ui-ext component of Keycloak, which provides extended administrative user interface capabilities. The issue occurs because certain bulk role-removal endpoints fail to perform granular permission checks when deleting role mappings. This allows a delegated administrator with limited permissions to remove highly privileged roles from other users or groups, potentially disrupting administrative access control.
- Vendor
- Red Hat
- Product
- Red Hat Build of Keycloak
- CVSS
- MEDIUM 4.9
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-11
- Original CVE updated
- 2026-06-11
- Advisory published
- 2026-06-11
- Advisory updated
- 2026-06-11
Who should care
Administrators of Keycloak instances, particularly those with delegated administrative access, should be aware of this vulnerability and take steps to mitigate it.
Technical summary
The admin-ui-ext component of Keycloak contains a flaw that allows a delegated administrator with limited permissions to remove highly privileged roles from other users or groups. This is due to certain bulk role-removal endpoints failing to perform granular permission checks when deleting role mappings.
Defensive priority
MEDIUM
Recommended defensive actions
- Apply patches or updates provided by the vendor to address the vulnerability.
- Review and restrict delegated administrative access to minimize the impact of this vulnerability.
- Monitor Keycloak instance logs for suspicious role-removal activity.
Evidence notes
The CVE-2026-11986 record was obtained from the official CVE database and the NVD detail page.
Official resources
CVE-2026-11986 was published on 2026-06-11T18:16:25.033Z and modified on 2026-06-11T20:56:29.653Z.