A flaw was found in Keycloak. A Keycloak server configured to support mTLS authentication for OAuth/OpenID clients does not properly verify the client certificate chain. A client that possesses a proper certificate can authorize itself as any other client, therefore, access data
A flaw was found in Keycloak. A Keycloak server configured to support mTLS authentication for OAuth/OpenID clients does not properly verify the client certificate chain. A client that possesses a proper certificate can authorize itself as any other client, therefore, access data that belongs to other clients.
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Single Sign | On 7 — unspecified |
| Red Hat | Red Hat Single Sign | On 7.6 for RHEL 7 — 0:18.0.8-1.redhat_00001.1.el7sso |
| Red Hat | Red Hat Single Sign | On 7.6 for RHEL 8 — 0:18.0.8-1.redhat_00001.1.el8sso |
| Red Hat | Red Hat Single Sign | On 7.6 for RHEL 9 — 0:18.0.8-1.redhat_00001.1.el9sso |
| Red Hat | RHEL | 8 based Middleware Containers — 7.6-24 |
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.