CVE-2026-16103

A flaw was found in the keycloak-services component of Keycloak. This issue is an incomplete fix for CVE-2026-9798, where brute-force protection checks were added to the Client-Initiated Backchannel Authentication CIBA initiation handler but were omitted from the token redemption handler. This...

Access Control Bypass

Overview org.keycloak:keycloak-services is an open source identity and access management solution for modern applications and services. Affected versions of this package are vulnerable to Access Control Bypass through the Client-Initiated Backchannel Authentication token redemption handler in the...

CVE-2026-9798

A flaw was found in Keycloak, an open-source identity and access management solution. When a user account is temporarily locked due to repeated failed login attempts, an attacker with valid client credentials can exploit the Client-Initiated Backchannel Authentication CIBA flow to bypass this...

Server-Side Request Forgery (SSRF)

Keycloak is vulnerable to Server-Side Request Forgery SSRF. The vulnerability is due to insufficient validation of client-configured backchannel notification endpoints in the CIBA feature, allowing attackers to trigger blind server-side requests to internal services or protected network resources...

GHSA-FWHW-CHW4-GH37 Keycloak Server-Side Request Forgery (SSRF) vulnerability

A flaw was found in Keycloak’s CIBA feature where insufficient validation of client-configured backchannel notification endpoints could allow blind server-side requests to internal services...

CVE-2026-1518

CVE-2026-1518 is marked as rejected in the public CVE feed. Connected documents, however, describe a Keycloak SSRF issue via the CIBA backchannel notification endpoint . The vulnerability arises from insufficient validation of the client-configured backchannel_notification_endpoint during client ...

ciba-online.net Cross Site Scripting vulnerability OBB-3811391

Following the coordinated and responsible vulnerability disclosure guidelines of the ISO 29147 standard, Open Bug Bounty has: a. verified the vulnerability and confirmed its existence; b. notified the website operator about its existence. Technical details of the vulnerability are currently hidde...