Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-18573
Red Hat Red Hat build of Keycloak 26.6 — Keycloak-services: keycloak-services: client access-type policy condition bypass during client update
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L L N U N H N 6.5 .0048 39.3 —
AFFECTED
Product Versions Fixed
Red Hat build of Keycloak 26.6 unspecified 26.6.7-3
Red Hat build of Keycloak 26.6 unspecified 26.6-20
Red Hat build of Keycloak 26.6 unspecified 26.6-20
Red Hat build of Keycloak 26.6.7 unspecified —
Red Hat build of Keycloak 26.6.7 unspecified —
Red Hat build of Keycloak 26.6.7 unspecified —
Red Hat Data Grid 8 unspecified —
Red Hat JBoss Enterprise Application Platform Expansion Pack unspecified —
Red Hat Single Sign-On 7 unspecified —
TIMELINE
Aug 2 Reserved by redhat
Aug 2 Published (CNA: redhat)
Sep 16 PATCH SHIPPED — CVE-2026-18573 (Red Hat build of Keycloak 26.6). Fixed in Red Hat build of Keycloak 26.6 26.6.7-3.
Description
A flaw was found in the keycloak-services component of Keycloak, which is used for managing authentication and authorization flows. The issue occurs when a realm administrator configures client policies to enforce specific authentication requirements on confidential clients. Due to improper evaluation of the client state during an update operation, an attacker with client management permissions can bypass these security policies by first creating a public client and then updating it to a confidential client with weaker authentication. This can result in the persistence of clients that do not comply with the intended security hardening of the realm.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| August 2, 2026 | Reserved | Reserved by redhat |
| August 2, 2026 | Published | Published (CNA: redhat) |
| September 16, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-18573 (Red Hat build of Keycloak 26.6). Fixed in Red Hat build of Keycloak 26.6 26.6.7-3. |
Affected
Affected products and packages — 9 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat build of Keycloak 26.6 | — | — | 26.6.7-3 |
| Red Hat | Red Hat build of Keycloak 26.6 | — | — | 26.6-20 |
| Red Hat | Red Hat build of Keycloak 26.6 | — | — | 26.6-20 |
| Red Hat | Red Hat build of Keycloak 26.6.7 | — | — | — |
| Red Hat | Red Hat build of Keycloak 26.6.7 | — | — | — |
| Red Hat | Red Hat build of Keycloak 26.6.7 | — | — | — |
| Red Hat | Red Hat Data Grid 8 | — | — | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | — | — | — |
| Red Hat | Red Hat Single Sign-On 7 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-18573 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
