CVE-2026-18963

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

publishedCWE-640

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.

Technical severity9.1 criticalCVSS 3.1 · CNA: redhat

Published2026-08-18Source updated 2026-11-12

Collected2026-11-122 attributed sources

Fixes and workarounds

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.

Source: CNA: redhat

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Red Hat build of Keycloak 26.4 Red Hat `rhbk/keycloak-operator-bundle` https://catalog.redhat.com/software/containers/	≥ 26.4.15-1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat build of Keycloak 26.4 Red Hat `rhbk/keycloak-rhel9` https://catalog.redhat.com/software/containers/	≥ 26.4-23; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat build of Keycloak 26.4 Red Hat `rhbk/keycloak-rhel9-operator` https://catalog.redhat.com/software/containers/	≥ 26.4-23; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat build of Keycloak 26.4.15 Red Hat `keycloak-services` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat build of Keycloak 26.4.15 Red Hat `rhbk-openshift-rhel9/rhbk-openshift-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat build of Keycloak 26.6 Red Hat `rhbk/keycloak-operator-bundle` https://catalog.redhat.com/software/containers/	≥ 26.6.6-1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat build of Keycloak 26.6 Red Hat `rhbk/keycloak-rhel9` https://catalog.redhat.com/software/containers/	≥ 26.6-12; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat build of Keycloak 26.6 Red Hat `rhbk/keycloak-rhel9-operator` https://catalog.redhat.com/software/containers/	≥ 26.6-12; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat build of Keycloak 26.6.6 Red Hat `keycloak-services` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat build of Keycloak 26.6.6 Red Hat `rhbk-keycloak-rhel9/rhbk-keycloak-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat build of Keycloak 26.6.6 Red Hat `rhbk-openshift-rhel9/rhbk-openshift-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat Single Sign-On 7 Red Hat `keycloak-services` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat Single Sign-On 7.6 for RHEL 7 Red Hat `rh-sso7-keycloak` https://access.redhat.com/downloads/content/package-browser/	≥ 0:18.0.21-1.redhat_00001.1.el7sso; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Single Sign-On 7.6 for RHEL 9 Red Hat `rh-sso7-keycloak` https://access.redhat.com/downloads/content/package-browser/	≥ 0:18.0.21-1.redhat_00001.1.el9sso; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat JBoss Enterprise Application Platform Expansion Pack Red Hat `keycloak-services` https://access.redhat.com/jbossnetwork/restricted/listSoftware.html	Range not reported Other versions: unaffected	CNA: redhat
Industrial Edge Management Cloud Siemens	≥ 0; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
Industrial Edge Management Pro V1 Siemens	≥ V1.14.9; < V1.15.20 (affected, custom) Other versions: unknown	ADP: siemens-SADP
Industrial Edge Management Pro V2 Siemens	≥ V2.2.0; < V2.2.2 (affected, custom) Other versions: unknown	ADP: siemens-SADP
Industrial Edge Management Virtual Siemens	≥ V2.6.0; < V2.9.1 (affected, custom) Other versions: unknown	ADP: siemens-SADP

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 9.1 critical	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`	CNA: redhat

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://access.redhat.com/errata/RHSA-2026:56519CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:56520CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:56523CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:56524CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:99763CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:99764CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:99766CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-18963CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2511595CNA: redhat · issue-tracking, x_refsource_REDHAT
https://cert-portal.siemens.com/productcert/html/ssa-503852.htmlADP: siemens-SADP

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