What is CVE-2026-18571?

CVE-2026-18571 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Missing Authorization. CVSS score: 6.6/10. Published 2026-08-02.

How severe is CVE-2026-18571?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Auth bypass in Red Hat Build Of Keycloak

CVE-2026-18571

A flaw was found in the user creation component of Keycloak when Fine-Grained Admin Permissions V2 (FGAP V2) is enabled. This issue allows a sub-administrator with permission to create users to add those users to any group, even groups the…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Red Hat Build Of Keycloak
Red Hat Data Grid 8
Red Hat Jboss Enterprise Application Platform Expansion Pack
Red Hat Single Sign-on 7

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-18571?: CVE-2026-18571 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Missing Authorization. CVSS score: 6.6/10. Published 2026-08-02.
How severe is CVE-2026-18571?: Medium severity. CVSS v3 base score is 6.6 out of 10.