---
id: CVE-2026-97847
title: >-
  Keycloak-services: keycloak-services: client manager can substitute
  sessionless token principal via hardcoded-claim mappers to obtain realm
  administrator authority
summary: >-
  A flaw was found in the protocol mapper and identity resolution components of
  Keycloak. The issue occurs when a client manager uses hardcoded-claim mappers
  to override identity claims in sessionless service-account tokens. Because
  these …
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L'
cvssSource: cna
cwe:
  - CWE-287
vendor: Red Hat
product: keycloak-services
affected:
  - keycloak-services (all versions)
  - rhbk/keycloak-rhel9 (all versions)
  - keycloak-services
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T17:16:10.269Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-97847'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-97847'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2540950'
    label: RHBZ#2540950
tags:
  - cve.org
ingestedAt: '2026-11-05T22:38:31.433Z'
---

## Overview

A flaw was found in the protocol mapper and identity resolution components of Keycloak. The issue occurs when a client manager uses hardcoded-claim mappers to override identity claims in sessionless service-account tokens. Because these tokens lack a session ID, Keycloak may incorrectly resolve the token bearer as a different, highly privileged user based on the manipulated claims. This can allow an attacker with limited client management permissions to impersonate a realm administrator and gain full control over the realm.

## Affected

- `keycloak-services (all versions)`
- `rhbk/keycloak-rhel9 (all versions)`
- `keycloak-services`

## Remediation

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

### Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.