---
id: CVE-2026-92358
title: A flaw was found in the first broker login flow of Keycloak
summary: >-
  A flaw was found in the first broker login flow of Keycloak. When a user
  confirms an account-linking request from a different browser, a temporary
  proof is created to validate the link. However, this proof is not properly
  cleared after t…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-613
vendor: Red Hat
product: keycloak/rhbk-openshift-rhel9
affected:
  - keycloak/rhbk-openshift-rhel9 (all versions)
  - keycloak-services (all versions)
  - rhbk/keycloak-rhel9 (all versions)
  - keycloak-services (all versions)
published: '2026-09-16'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T16:18:32.643'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92358'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-92358'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92358.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-92358'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92358'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-17T15:49:36.310576Z'
epss: 0.00274
epssPercentile: 0.17555
ingestedAt: '2026-09-16T06:51:06.258Z'
---

## Overview

A flaw was found in the first broker login flow of Keycloak. When a user confirms an account-linking request from a different browser, a temporary proof is created to validate the link. However, this proof is not properly cleared after the link is established or when the user later manually removes the link. An attacker who controls the external identity can exploit this leftover proof to silently re-establish the link and gain unauthorized access to the victims account without any further confirmation.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Build of Keycloak, Red Hat Single Sign-On 7 · no fix planned: Red Hat Single Sign-On 7, Red Hat Build of Keycloak · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92358.json)