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CVE-2026-12388— Keycloak-broker: keycloak: privilege escalation to realm administrator via improper authorization in identity provider mapper

Quick assessment

Affected
Red Hat Red Hat Build of Keycloak
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Keycloak是Keycloak组织开源的一种开源身份和访问管理解决方案。 Keycloak存在权限许可和访问控制问题漏洞，该漏洞源于Identity Provider (IdP) mapper组件问题，可能导致具有有限权限的管理员通过创建“Hardcoded Role”mapper分配高级管理角色，绕过安全检查并获得对完整领域的完全控制。

CVSS 6.5 · Medium EPSS 0.40% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
Red Hat Red Hat Build of Keycloak any affected
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I. Basic Information for CVE-2026-12388

Vulnerability Information
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Vulnerability Title
Keycloak-broker: keycloak: privilege escalation to realm administrator via improper authorization in identity provider mapper
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权授予不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Keycloak 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak组织开源的一种开源身份和访问管理解决方案。 Keycloak存在权限许可和访问控制问题漏洞，该漏洞源于Identity Provider (IdP) mapper组件问题，可能导致具有有限权限的管理员通过创建“Hardcoded Role”mapper分配高级管理角色，绕过安全检查并获得对完整领域的完全控制。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Build of Keycloak - cpe:/a:redhat:build_keycloak:

II. Public POCs for CVE-2026-12388

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III. Intelligence Information for CVE-2026-12388

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Vendor Advisories for CVE-2026-12388 (2)

Same Patch Batch · Red Hat · 2026-06-30 · 6 CVEs total

CVE-2026-14164 7.5 HIGH Libarchive: double-free vulnerability in rar5 decompression logic via dangling filtered_bu
CVE-2026-4629 6.5 MEDIUM Keycloak: keycloak: privilege escalation through hardcoded role mapper injection
CVE-2026-12610 6.4 MEDIUM Sssd: use-after-free crash in sssd' 'sssd_pam' process
CVE-2026-13316 4.4 MEDIUM Foreman: ssrf to cloud metada service through unvalidated test_url parameters in foreman c
CVE-2026-14209 4.3 MEDIUM Keycloak-admin-ui: keycloak-admin-ui:admin ui extension brute-force-user endpoint bypasses

IV. Related Vulnerabilities

Same product: Red Hat Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-266

V. Comments for CVE-2026-12388

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