---
id: CVE-2026-18963
title: >-
  A flaw was found in the reset-credentials flow of the keycloak-services
  component, which is the core engine for identity and access management in Red
  Hat Build of Keycloak
summary: >-
  A flaw was found in the reset-credentials flow of the keycloak-services
  component, which is the core engine for identity and access management in Red
  Hat Build of Keycloak. The issue allows an unauthenticated attacker to force
  the passwo…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-640
vendor: Red Hat
product: rhbk/keycloak-operator-bundle
affected:
  - rhbk/keycloak-operator-bundle (all versions)
  - rhbk/keycloak-rhel9 (all versions)
  - rhbk/keycloak-rhel9-operator (all versions)
  - keycloak-services
  - rhbk-openshift-rhel9/rhbk-openshift-rhel9
  - rhbk/keycloak-operator-bundle (all versions)
  - rhbk/keycloak-rhel9 (all versions)
  - rhbk/keycloak-rhel9-operator (all versions)
  - keycloak-services
  - rhbk-keycloak-rhel9/rhbk-keycloak-rhel9
  - rhbk-openshift-rhel9/rhbk-openshift-rhel9
  - keycloak-services
  - keycloak-services
published: '2026-08-18'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T09:17:43.063'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18963'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:56519'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:56520'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:56523'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:56524'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-18963'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2511595'
    label: secalert@redhat.com
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-503852.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-18963.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-18963'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18963'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-08-20T13:53:38.227092Z'
epss: 0.04682
epssPercentile: 0.91732
exploits:
  exploitdb: true
  github: 18
  githubRepos:
    - 'https://github.com/ynsmroztas/KeySniper'
    - 'https://github.com/Snizi/CVE-2026-18963-Exploit'
    - 'https://github.com/Red-Darkin/CVE-2026-18963-keycloak'
  nuclei:
    - CVE-2026-18963
  checkedAt: '2026-10-27T17:01:08.805Z'
exploitAvailable: true
ingestedAt: '2026-09-08T15:33:26.954Z'
patched:
  - build_of_keycloak 26.4
  - build_of_keycloak 26.6
  - build_of_keycloak 26.4.15
  - build_of_keycloak 26.6.6
---

## Overview

A flaw was found in the reset-credentials flow of the keycloak-services component, which is the core engine for identity and access management in Red Hat Build of Keycloak. The issue allows an unauthenticated attacker to force the password reset process for any user without needing to click the required email verification link. This can result in the attacker gaining full control over target user accounts by directly setting new credentials.

## Remediation

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

## Vendor advisories

- **RHSA-2026:56519** · Red Hat · fixed in: Red Hat build of Keycloak 26.4 · released 2026-08-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:56519)
- **RHSA-2026:56524** · Red Hat · fixed in: Red Hat build of Keycloak 26.6 · released 2026-08-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:56524)
- **RHSA-2026:56520** · Red Hat · fixed in: Red Hat build of Keycloak 26.4.15 · released 2026-08-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:56520)
- **RHSA-2026:56523** · Red Hat · fixed in: Red Hat build of Keycloak 26.6.6 · released 2026-08-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:56523)
- **Red Hat VEX** · Critical · affected: Red Hat Single Sign-On 7 · no fix planned: Red Hat Single Sign-On 7 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-18963.json)