CVE-2026-12388Network attack vector

Realm takeover via unchecked IdP role mapping

Published Jun 30, 2026 · Updated Jun 30, 2026

Improper authorization in Red Hat build of Keycloak allows remote authenticated users to escalate from delegated administrator to realm administrator. IdentityProviderResource.addMapper accepts a Hardcoded Role mapper without invoking requireMapRole, and brokered login then grants the configured role unconditionally. Exploitation requires manage-identity-providers permission, control of an OIDC or SAML provider, mapper creation, and a brokered login; success grants full realm control.

CVSS severity6.5
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Red Hat build of Keycloak allows remote authenticated users to escalate from delegated administrator to realm administrator. IdentityProviderResource.addMapper accepts a Hardcoded Role mapper without invoking requireMapRole, and brokered login then grants the configured role unconditionally. Exploitation requires manage-identity-providers permission, control of an OIDC or SAML provider, mapper creation, and a brokered login; success grants full realm control.

The record

CVE
CVE-2026-12388
Published
Jun 30, 2026
Updated
Jun 30, 2026
Vendor
389 Directory Server
Product
Red Hat build of Keycloak
Classifications
CWE-266, T1068
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

389 Directory Server · Red Hat build of KeycloakAffected versions are unavailable in this record.

Published CVSS scores

6.5Red HatCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-266Incorrect Privilege Assignment
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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