---
id: CVE-2026-9800
title: A flaw was found in Keycloak Policy Enforcer
summary: >-
  A flaw was found in Keycloak Policy Enforcer. This vulnerability allows any
  authenticated user to bypass all authorization policies, including role,
  scope, and User-Managed Access (UMA) permission checks. By including the
  configured acce…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-1025
vendor: redhat
product: build_of_keycloak
affected:
  - 'build_of_keycloak >= 26.4, < 26.4.13'
  - 'build_of_keycloak >= 26.6, <= 26.6.4'
patched:
  - build_of_keycloak 26.4.13
published: '2026-06-25'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T13:19:33.747'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-9800'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:30049'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:30050'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:30083'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:30084'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:36002'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:36013'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:50846'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:50847'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-9800'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2482472'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:30049'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:30050'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:30083'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:30084'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:50846'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:50847'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/security/cve/CVE-2026-9800'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2482472'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9800.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-9800'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-9800'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-06-25T17:27:58.852057Z'
epss: 0.00651
epssPercentile: 0.49015
ingestedAt: '2026-08-06T20:03:56.292Z'
---

## Overview

A flaw was found in Keycloak Policy Enforcer. This vulnerability allows any authenticated user to bypass all authorization policies, including role, scope, and User-Managed Access (UMA) permission checks. By including the configured access-denied page path within a request URL, either as a path segment or a query parameter, an attacker can gain unauthorized access to protected resources.

## Affected

- `build_of_keycloak >= 26.4, < 26.4.13`
- `build_of_keycloak >= 26.6, <= 26.6.4`

## Remediation

Upgrade past the affected range:

- `build_of_keycloak 26.4.13`

## Vendor advisories

- **RHSA-2026:50847** · Red Hat · fixed in: Red Hat build of Keycloak 26.4 · released 2026-08-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:50847)
- **RHSA-2026:30050** · Red Hat · fixed in: Red Hat build of Keycloak 26.4 · released 2026-06-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:30050)
- **RHSA-2026:30084** · Red Hat · fixed in: Red Hat build of Keycloak 26.6 · released 2026-06-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:30084)
- **RHSA-2026:30049** · Red Hat · fixed in: Red Hat build of Keycloak 26.4.13 · released 2026-06-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:30049)
- **RHSA-2026:50846** · Red Hat · fixed in: Red Hat build of Keycloak 26.4.14 · released 2026-08-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:50846)
- **RHSA-2026:30083** · Red Hat · fixed in: Red Hat build of Keycloak 26.6.4 · released 2026-06-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:30083)
- **Red Hat VEX** · Important · affected: Red Hat Single Sign-On 7 · no fix planned: Red Hat Single Sign-On 7 · updated 2026-09-13 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9800.json)