Medium severity4.3NVD Advisory· Published Jul 17, 2026· Updated Aug 31, 2026
CVE-2026-16103
CVE-2026-16103
Description
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 allows an attacker with valid client credentials to obtain access and refresh tokens for a user account that has been locked due to brute-force protection, provided the authentication request was started before the lockout occurred and was approved by the user.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*
Patches
Vulnerability mechanics
References
2- access.redhat.com/security/cve/CVE-2026-16103nvdVendor Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor Advisory
News mentions
1- Keycloak Services: Nine Moderate Vulnerabilities Disclosed in Authorization and Session ManagementVypr Intelligence · Jul 17, 2026