CVE-2026-18963

Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass

Published Aug 18, 2026 CVSS 3.1 · 9.1 Critical EPSS 6.6% KEV · Not listed
Description
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

Vendor Workaround

If an immediate upgrade is not possible, disabling the "Forgot password" functionality across all realms can be used as a temporary mitigation. In the RHBK administration console, navigate to: Realm settings → Login → Forgot password → Off Apply this setting to all realms. Upgrade to a fixed version as soon as possible.

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Github GHSA Github GHSA GHSA-4gv3-mc9p-5wqc Keycloak: Unauthenticated account takeover via reset-credentials flow bypass
History
Type Values Removed Values Added
First Time appeared Redhat rhosemc
CPEs cpe:/a:redhat:red_hat_single_sign_on:7.6::el8
cpe:/a:redhat:rhosemc:1.0::el8
Vendors & Products Redhat rhosemc
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:red_hat_single_sign_on:7.6::el7
cpe:/a:redhat:red_hat_single_sign_on:7.6::el9
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:red_hat_single_sign_on:7 cpe:/a:redhat:red_hat_single_sign_on:7.6
References
Type Values Removed Values Added
First Time appeared Redhat build Of Keycloak
Redhat jboss Enterprise Application Platform Expansion Pack
Redhat single Sign On
Vendors & Products Redhat build Of Keycloak
Redhat jboss Enterprise Application Platform Expansion Pack
Redhat single Sign On
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
CPEs cpe:/a:redhat:build_keycloak:26.4::el9
cpe:/a:redhat:build_keycloak:26.6::el9
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:build_keycloak: cpe:/a:redhat:build_keycloak:26.6
References
Type Values Removed Values Added
Description 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.
Title Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass
First Time appeared Redhat
Redhat build Keycloak
Redhat jbosseapxp
Redhat red Hat Single Sign On
Weaknesses CWE-640
CPEs cpe:/a:redhat:build_keycloak:
cpe:/a:redhat:jbosseapxp
cpe:/a:redhat:red_hat_single_sign_on:7
Vendors & Products Redhat
Redhat build Keycloak
Redhat jbosseapxp
Redhat red Hat Single Sign On
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 12, 2026, 10:37 PM
Reserved
Aug 5, 2026, 3:00 PM
Status
Awaiting Analysis
Published
Aug 18, 2026, 5:16 PM
Modified
Nov 13, 2026, 12:20 AM
Severity
Critical
Public date
Aug 17, 2026, 12:00 AM