CVEvulnerability

CVE-2026-16103

4.3 MEDIUM Published 2026-07-17 Modified 2026-08-31 Official page ↗
Status
Modified
Published
2026-07-17
Last modified
2026-08-31
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Weaknesses
CWE-305, CWE-841

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.

Affected configurations

• redhat build of keycloak

Related

Weakness · CWE (2)

  • CWE-305 Authentication Bypass by Primary Weakness weakness
  • CWE-841 Improper Enforcement of Behavioral Workflow weakness

References