CVE-2026-18206
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Keycloak-services: keycloak-services: client policy source-host wildcard domain matching bypass
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 register or update clients. Due to improper validation, the system accepts any hostname that ends with the specified domain suffix, even if it is not a legitimate subdomain. An attacker who can control the reverse DNS of their connection can bypass these host-based restrictions, potentially allowing unauthorized client modifications.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Red Hat Build of Keycloak
- Vendor
- Red Hat
- Product
- Red Hat Build of Keycloak
- Platforms
- Unknown
- Default status
affected- Package
- keycloak-services
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.
Red Hat Build of Keycloak
- Vendor
- Red Hat
- Product
- Red Hat Build of Keycloak
- Platforms
- Unknown
- Default status
affected- Package
- rhbk-keycloak-rhel9/rhbk-keycloak-rhel9
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.
Red Hat Build of Keycloak
- Vendor
- Red Hat
- Product
- Red Hat Build of Keycloak
- Platforms
- Unknown
- Default status
affected- Package
- rhbk-openshift-rhel9/rhbk-openshift-rhel9
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.
Red Hat Data Grid 8
- Vendor
- Red Hat
- Product
- Red Hat Data Grid 8
- Platforms
- Unknown
- Default status
unaffected- Package
- keycloak-services
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.
Red Hat JBoss Enterprise Application Platform Expansion Pack
- Vendor
- Red Hat
- Product
- Red Hat JBoss Enterprise Application Platform Expansion Pack
- Platforms
- Unknown
- Default status
unaffected- Package
- keycloak-services
- Package collection
- https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
No explicit version tuples; consult this entry's default status.
Red Hat Single Sign-On 7
- Vendor
- Red Hat
- Product
- Red Hat Single Sign-On 7
- Platforms
- Unknown
- Default status
unaffected- Package
- keycloak-services
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.