---
id: CVE-2026-107623
title: >-
  A flaw was found in the OIDC Dynamic Client Registration (DCR) component of
  Keycloak
summary: >-
  A flaw was found in the OIDC Dynamic Client Registration (DCR) component of
  Keycloak. A bug in the response serialization causes the backchannel logout
  offline token revocation setting to be omitted from responses. When a client
  performs…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-862
vendor: Red Hat
product: keycloak-services
affected:
  - keycloak-services (all versions)
  - rhbk/keycloak-rhel9 (all versions)
  - keycloak-services
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T20:49:23.240'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107623'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-107623'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2547957'
    label: secalert@redhat.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-08T17:41:07.629367Z'
ingestedAt: '2026-10-08T15:49:37.992Z'
---

## Overview

A flaw was found in the OIDC Dynamic Client Registration (DCR) component of Keycloak. A bug in the response serialization causes the backchannel logout offline token revocation setting to be omitted from responses. When a client performs a standard update, this missing information causes the setting to be silently disabled. As a result, offline tokens may remain valid even after a user session is terminated via backchannel logout.

## Remediation

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