Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.6 | — | — |
| Red Hat | Red Hat build of Keycloak 26.6.5 | — | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | keycloak-26.5 +3 | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.keycloak:keycloak-rest-admin-ui-ext | < 26.7.0 | 26.7.0 | GHSA-6w3v-mcfh-m3q7 |
Advisories 1
- WID-SEC-2026-1894 Keycloak (admin-ui-ext): Schwachstelle ermöglicht Manipulation von Dateien BSI CERT-Bund (WID) · Aug 5, 2026
References
- RHSA-2026:50848 vendor-advisory
- RHSA-2026:50849 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-11986 vdb-entry
- RHBZ#2487906 issue-tracking