---
id: CVE-2026-18214
title: >-
  Keycloak allows users to log in using Google accounts and can be configured to
  only allow users from specific Google Workspace domains
summary: >-
  Keycloak allows users to log in using Google accounts and can be configured to
  only allow users from specific Google Workspace domains. A flaw was found
  where the token exchange feature, which allows swapping a Google token for a
  Keycloa…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-862
vendor: redhat
product: build_of_keycloak
affected:
  - build_of_keycloak
patched:
  - build_of_keycloak 26.6.7
published: '2026-07-31'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T19:17:09.047'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18214'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:68277'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:68278'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-18214'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2508308'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-18214.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-18214'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18214'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00402
epssPercentile: 0.31878
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-07-31T23:21:18.526784Z'
ingestedAt: '2026-08-01T23:16:02.176Z'
---

## Overview

Keycloak allows users to log in using Google accounts and can be configured to only allow users from specific Google Workspace domains. A flaw was found where the token exchange feature, which allows swapping a Google token for a Keycloak token, does not check these domain restrictions. This means an attacker with a valid Google account from a different domain could bypass the security check and gain access to the Keycloak realm.

## Affected

- `build_of_keycloak`

## Remediation

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

## Vendor advisories

- **RHSA-2026:68278** · Red Hat · fixed in: Red Hat build of Keycloak 26.6.7 · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68278)
- **RHSA-2026:68277** · Red Hat · fixed in: Red Hat build of Keycloak 26.6 · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:68277)