# CVE-2026-18963: Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass

Status: published. Published: 2026-08-18. Updated: 2026-11-12.

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

- 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

- Red Hat / Red Hat build of Keycloak 26.4 (rhbk/keycloak-operator-bundle): ≥ 26.4.15-1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 26.4 (rhbk/keycloak-rhel9): ≥ 26.4-23; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 26.4 (rhbk/keycloak-rhel9-operator): ≥ 26.4-23; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 26.4.15 (keycloak-services): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 26.4.15 (rhbk-openshift-rhel9/rhbk-openshift-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 26.6 (rhbk/keycloak-operator-bundle): ≥ 26.6.6-1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 26.6 (rhbk/keycloak-rhel9): ≥ 26.6-12; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 26.6 (rhbk/keycloak-rhel9-operator): ≥ 26.6-12; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 26.6.6 (keycloak-services): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 26.6.6 (rhbk-keycloak-rhel9/rhbk-keycloak-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 26.6.6 (rhbk-openshift-rhel9/rhbk-openshift-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Single Sign-On 7 (keycloak-services): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Single Sign-On 7.6 for RHEL 7 (rh-sso7-keycloak): ≥ 0:18.0.21-1.redhat_00001.1.el7sso; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Single Sign-On 7.6 for RHEL 9 (rh-sso7-keycloak): ≥ 0:18.0.21-1.redhat_00001.1.el9sso; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack (keycloak-services): Version range not reported. Source: CNA: redhat
- Siemens / Industrial Edge Management Cloud: ≥ 0; < * (affected, custom). Source: ADP: siemens-SADP
- Siemens / Industrial Edge Management Pro V1: ≥ V1.14.9; < V1.15.20 (affected, custom). Source: ADP: siemens-SADP
- Siemens / Industrial Edge Management Pro V2: ≥ V2.2.0; < V2.2.2 (affected, custom). Source: ADP: siemens-SADP
- Siemens / Industrial Edge Management Virtual: ≥ V2.6.0; < V2.9.1 (affected, custom). Source: ADP: siemens-SADP

## Severity and prioritization

- CVSS 3.1: 9.1 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 6.59% as of 2026-11-12; percentile 93.93%

- SSVC: exploitation none; automatable yes; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-640

## Exploit evidence

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

## References

- https://access.redhat.com/errata/RHSA-2026:56519 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:56520 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:56523 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:56524 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:99763 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:99764 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:99766 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2026-18963 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2511595 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://cert-portal.siemens.com/productcert/html/ssa-503852.html (ADP: siemens-SADP)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-18963; retrieved 2026-11-12; source updated 2026-11-12

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-18963; retrieved 2026-11-12; source updated Not reported

Revision: cdf2038864de2194ed8939a24dade09b7cea360c4e02ec727a875b6f7cd23c6b

Canonical: https://y2.dev/cve/CVE-2026-18963

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