EUVD-2026-50215
GHSA-fvjx-r757-3r6r
Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N
PR:H confirmed by requirement for an authenticated admin role; I:H reflects full control over organization authentication trust chain; C:L for incidental org metadata exposure; A:N as no availability impact exists.
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
Lifecycle Timeline
2DescriptionCVE.org
Keycloak provides a way to manage identity providers and organizations through its administrative API. A flaw was discovered where an administrator with permission to manage identity providers could link a new provider to an organization without having the required permissions to manage that organization. This could allow an unauthorized administrator to influence how users log into specific organizations.
AnalysisAI
Missing authorization in Keycloak's administrative API allows a scoped administrator to exceed their privilege boundary by linking identity providers to organizations they are not authorized to manage. Affected deployments include Red Hat Build of Keycloak, Red Hat Single Sign-On 7, and related Red Hat products. An administrator who holds identity provider management permissions but lacks organization management rights can silently reconfigure authentication flows for organizations outside their administrative scope, potentially redirecting user logins through attacker-controlled providers. No public exploit code exists and this vulnerability is not listed in CISA KEV at time of analysis.
Technical ContextAI
Keycloak is an open-source Identity and Access Management platform that supports fine-grained administrative role delegation. Its REST-based administrative API separates permissions for managing identity providers from permissions for managing organizations (multi-tenant realms or tenancy groups). CWE-862 (Missing Authorization) describes the root cause: the API endpoint that links an identity provider to an organization fails to verify whether the requesting administrator also holds the 'manage-organizations' permission for the target organization - it only checks the 'manage-identity-providers' permission. This is a classic broken object-level authorization pattern in a privileged API. Affected CPEs cover cpe:2.3:a:red_hat:red_hat_build_of_keycloak, cpe:2.3:a:red_hat:red_hat_single_sign-on_7, cpe:2.3:a:red_hat:red_hat_data_grid_8, and cpe:2.3:a:red_hat:red_hat_jboss_enterprise_application_platform_expansion_pack.
RemediationAI
Patch availability per vendor advisory is indicated by Red Hat's CVE page at https://access.redhat.com/security/cve/CVE-2026-18201, but no specific patched release version was confirmed in the available input data - consult the Red Hat advisory directly for exact fixed versions before upgrading. As a compensating control, administrators should audit and tighten the scope of identity provider management permissions: avoid granting the 'manage-identity-providers' role to administrators who do not also require 'manage-organizations' rights, thereby eliminating the permission gap this vulnerability exploits. Additionally, review existing identity provider-to-organization linkages in your Keycloak realm to detect any unauthorized associations that may have already been made. Restricting administrative API access to known IP ranges via network policy reduces exposure in environments where patching is delayed.
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
View allVendor StatusVendor
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External POC / Exploit Code
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