CVE-2026-109082 — Keycloak-services: keycloak-services: ciba confidential-only contract not enforced for public clients
A flaw was found in the Client-Initiated Backchannel Authentication CIBA implementation within the keycloak-services component of Keycloak. This component handles advanced authe…
Published: 2026-10-12 · CVSS: 6.8 · CVSS 3.1
A flaw was found in the Client-Initiated Backchannel Authentication CIBA implementation within the keycloak-services component of Keycloak. This component handles advanced authentication flows where a client initiates a login on behalf of a user. The issue occurs because Keycloak fails to verify that a client is authorized to use the CIBA flow, allowing public clients to bypass security requirements. An attacker could use this flaw to trick a user into approving a login request, eventually gaining full access to the users account without needing a client secret.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7