What is CVE-2026-18211?

CVE-2026-18211 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Input Validation. CVSS score: 4.2/10. Published 2026-07-31.

How severe is CVE-2026-18211?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Improper input validation in Red Hat Build Of Keycloak

CVE-2026-18211

A flaw was found in the secure-client-uris client policy executor within Keycloak core services. This component is responsible for enforcing security requirements on client configurations, such as requiring encrypted connections for redire…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N.

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-20 — Improper Input Validation

References

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

Frequently asked questions

What is CVE-2026-18211?: CVE-2026-18211 is a medium-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Input Validation. CVSS score: 4.2/10. Published 2026-07-31.
How severe is CVE-2026-18211?: Medium severity. CVSS v3 base score is 4.2 out of 10.