Description
A flaw was found in Keycloak's client registration service. A remote attacker, possessing a previously issued Registration Access Token (RAT), could exploit this vulnerability to re-enable a client that an administrator had explicitly disabled. This bypasses security controls, allowing the attacker to reset the client's secret and potentially regain privileged API access. The primary impact includes unauthorized information disclosure and potential integrity compromise.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | — | — |
| Red Hat | Red Hat build of Keycloak 26.4.13 | — | — |
| Red Hat | Red Hat build of Keycloak 26.6 | — | — |
| Red Hat | Red Hat build of Keycloak 26.6.4 | — | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.keycloak:keycloak-services | < 26.6.4 | 26.6.4 | GHSA-r7rc-c989-86g6 |
Advisories 1
- WID-SEC-2026-2093 Keycloak: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 5, 2026
References
- RHSA-2026:30049 vendor-advisory
- RHSA-2026:30050 vendor-advisory
- RHSA-2026:30083 vendor-advisory
- RHSA-2026:30084 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-9705 vdb-entry
- RHBZ#2481878 issue-tracking