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CVE-2026-18214— Keycloak-services: keycloak-services: google external access-token exchange bypasses hosted-domain restriction

CVSS 6.8 · Medium EPSS 0.20% · P10

Affected Version Matrix 6

VendorProductVersion RangeStatus
Red HatRed Hat Build of Keycloakanyaffected
anyaffected
anyaffected
Red HatRed Hat Data Grid 8anyunaffected
Red HatRed Hat JBoss Enterprise Application Platform Expansion Packanyunaffected
Red HatRed Hat Single Sign-On 7anyunaffected
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I. Basic Information for CVE-2026-18214

Vulnerability Information
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Vulnerability Title
Keycloak-services: keycloak-services: google external access-token exchange bypasses hosted-domain restriction
Source: CVE Program / CVE List V5
Vulnerability Description
Keycloak allows users to log in using Google accounts and can be configured to only allow users from specific Google Workspace domains. A flaw was found where the token exchange feature, which allows swapping a Google token for a Keycloak token, does not check these domain restrictions. This means an attacker with a valid Google account from a different domain could bypass the security check and gain access to the Keycloak realm.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat Build of Keycloak-cpe:/a:redhat:build_keycloak:
Red HatRed Hat Build of Keycloak-cpe:/a:redhat:build_keycloak:
Red HatRed Hat Build of Keycloak-cpe:/a:redhat:build_keycloak:
Red HatRed Hat Data Grid 8-cpe:/a:redhat:jboss_data_grid:8
Red HatRed Hat JBoss Enterprise Application Platform Expansion Pack-cpe:/a:redhat:jbosseapxp
Red HatRed Hat Single Sign-On 7-cpe:/a:redhat:red_hat_single_sign_on:7

II. Public POCs for CVE-2026-18214

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III. Intelligence Information for CVE-2026-18214

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Vendor Advisories for CVE-2026-18214 (2)

Same Patch Batch · Red Hat · 2026-07-31 · 14 CVEs total

CVE-2026-100798.5 HIGHStackrox: stackrox: deploy-time policy enforcement and visibility bypass via label injecti
CVE-2026-181418.2 HIGHAap-gateway: aap-gateway: authentication bypass in event-driven ansible via forged http he
CVE-2026-157227.5 HIGH389-ds-base: 389-ds-base: pre-authentication stack buffer overflow in get_ruvelement_from_
CVE-2026-117707.5 HIGH389-ds-base: 389-ds-base: pre-auth ldap filter injection in cleanallruv status check
CVE-2026-182156.8 MEDIUMKeycloak-services: keycloak-services: microsoft external access-token exchange bypasses co
CVE-2026-182086.5 MEDIUMKeycloak-services: keycloak-services: inactive out-of-audience token introspection leaks s
CVE-2026-182036.5 MEDIUMKeycloak-services: keycloak-services: group policy extendchildren matches sibling group pa
CVE-2026-161054.9 MEDIUMKeycloak-services: keycloak-services: missing per-role authorization on rolecontainerresou
CVE-2026-182184.2 MEDIUMKeycloak-services: keycloak-services: client not-before revocation ignored when realm not-
CVE-2026-182114.2 MEDIUMKeycloak-services: keycloak-services: secure-client-uris policy bypass via localhost-prefi
CVE-2026-182063.7 LOWKeycloak-services: keycloak-services: client policy source-host wildcard domain matching b
CVE-2026-182173.4 LOWKeycloak-services: keycloak-services: saml http-redirect binding response preserves query
CVE-2026-182093.4 LOWKeycloak-services: keycloak-services: oidc redirect_uri fragment bypass in http parameter

IV. Related Vulnerabilities

Same product: Red Hat Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-862

V. Comments for CVE-2026-18214

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