EUVD-2026-40301
GHSA-jxqv-2jjx-692h
Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
PR:H reflects mandatory IdP admin role; AV:N for web console access; no availability impact from role assignment alone.
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
1DescriptionCVE.org
A flaw was found in the Identity Provider (IdP) mapper component of Keycloak, which is used to manage how user information from external services is mapped to Keycloak users. An administrator with limited permissions to manage identity providers can exploit this flaw by creating a "Hardcoded Role" mapper that assigns high-level administrative roles (like realm-admin) to themselves or others. This allows a restricted administrator to bypass security checks and gain full control over the entire realm.
AnalysisAI
Privilege escalation in Red Hat Build of Keycloak's Identity Provider mapper component allows a restricted administrator with IdP management permissions to silently assign the built-in realm-admin role to themselves or other accounts by creating a Hardcoded Role mapper. This bypasses the authorization boundary intended to confine limited administrators within their delegated scope, resulting in full realm takeover. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an existing Keycloak account with the identity provider management administrative role - this is a non-default, explicitly delegated privilege that realm administrators must grant. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 6.5 (Medium) is derived from vector AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A semi-trusted administrator - for example, a partner organization's account provisioned with identity provider management scope in a shared Keycloak realm - logs into the Keycloak admin console and navigates to the IdP mapper configuration for any configured external provider. The attacker creates a new Hardcoded Role mapper targeting the built-in realm-admin role; on the attacker's next login through that IdP, the realm-admin role is silently assigned to their account. … |
| Remediation | The primary fix should be obtained from the Red Hat security advisory at https://access.redhat.com/security/cve/CVE-2026-12388; no specific patched version number is confirmed in the available intelligence, so consult that advisory for the exact target release. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-266 – Incorrect Privilege Assignment
View allSame technique Authentication Bypass
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