What is CVE-2026-18206?

CVE-2026-18206 is a low-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Input Validation. CVSS score: 3.7/10. Published 2026-07-31.

How severe is CVE-2026-18206?

Low severity. CVSS v3 base score is 3.7 out of 10.

Improper input validation in Red Hat Build Of Keycloak

CVE-2026-18206

A flaw was found in the keycloak-services component of Keycloak, which provides identity and access management services. The issue occurs when a realm administrator uses a wildcard domain (like *.example.com) to restrict which hosts can re…

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

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/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-2026-18206?: CVE-2026-18206 is a low-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Input Validation. CVSS score: 3.7/10. Published 2026-07-31.
How severe is CVE-2026-18206?: Low severity. CVSS v3 base score is 3.7 out of 10.