---
id: CVE-2026-105305
title: >-
  A flaw was found in the OIDC implementation of Keycloak, specifically within
  the Device Authorization Grant flow
summary: >-
  A flaw was found in the OIDC implementation of Keycloak, specifically within
  the Device Authorization Grant flow. This component allows devices with
  limited input capabilities to obtain security tokens. The issue occurs because
  the flow …
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-287
vendor: Red Hat
product: keycloak-services
affected:
  - keycloak-services (all versions)
  - rhbk/keycloak-rhel9 (all versions)
  - keycloak-services
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T15:09:20.387'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105305'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-105305'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2545801'
    label: secalert@redhat.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-06T12:44:09.472814Z'
ingestedAt: '2026-10-06T07:49:23.045Z'
epss: 0.00189
epssPercentile: 0.08414
---

## Overview

A flaw was found in the OIDC implementation of Keycloak, specifically within the Device Authorization Grant flow. This component allows devices with limited input capabilities to obtain security tokens. The issue occurs because the flow fails to check the minimum authentication level required by a client configuration. This allows an attacker who has stolen a user's password to bypass mandatory multi-factor authentication and gain unauthorized access to the Keycloak Admin REST API.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.