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CVE-2026-9099— Keycloak: group-admin escalation to realm-admin

Quick assessment

Affected
Red Hat Red Hat build of Keycloak 26.4
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存在授权问题漏洞，该漏洞源于Admin REST API中GroupResource.addChild()端点缺少授权检查，在启用Fine-Grained Admin Permissions v2 (FGAPv2)时，可能允许具有有限管理权限的已认证用户将高权限组重新挂载至其管理的组下，从而未经授权获得管理目标特权组成员和密码重置的能力，导致管理员密码被重置、账户被破坏和领域被完全接管，最终完全破坏保密性、完整性

CVSS 7.7 · High EPSS 0.49% · P40

Affected Version Matrix 8

VendorProduct Version RangeStatus
Red Hat Red Hat build of Keycloak 26.4 26.4.13-1< * unaffected
26.4-19< * unaffected
26.4-19< * unaffected
Red Hat Red Hat build of Keycloak 26.4.13 any unaffected
Red Hat Red Hat build of Keycloak 26.6 26.6.4-2< * unaffected
26.6-8< * unaffected
26.6-8< * unaffected
Red Hat Red Hat build of Keycloak 26.6.4 any unaffected
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I. Basic Information for CVE-2026-9099

Vulnerability Information
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Vulnerability Title
Keycloak: group-admin escalation to realm-admin
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak. A missing authorization check in the GroupResource.addChild() endpoint within the Admin REST API allows an authenticated user with limited administrative privileges to reparent any existing group. When Fine-Grained Admin Permissions v2 (FGAPv2) is enabled, an attacker with management rights over a single low-privilege group can reparent a highly privileged group (such as one possessing the realm-admin role) under their managed group. Because group permissions follow a hierarchical structure, this action unauthorizedly grants the attacker management and password-reset capabilities over the members of the targeted privileged group. An attacker can exploit this to reset an administrator's password, compromise the account, and achieve a full realm takeover, leading to a complete compromise of confidentiality, integrity, and availability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
Keycloak 授权问题漏洞
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存在授权问题漏洞，该漏洞源于Admin REST API中GroupResource.addChild()端点缺少授权检查，在启用Fine-Grained Admin Permissions v2 (FGAPv2)时，可能允许具有有限管理权限的已认证用户将高权限组重新挂载至其管理的组下，从而未经授权获得管理目标特权组成员和密码重置的能力，导致管理员密码被重置、账户被破坏和领域被完全接管，最终完全破坏保密性、完整性
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 26.4 26.4.13-1 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4 26.4-19 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4 26.4-19 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4.13 - cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.6 26.6.4-2 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6 26.6-8 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6 26.6-8 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6.4 - cpe:/a:redhat:build_keycloak:26.6::el9

II. Public POCs for CVE-2026-9099

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III. Intelligence Information for CVE-2026-9099

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Vendor Advisories for CVE-2026-9099 (1)

Other References for CVE-2026-9099 (5)

Same Patch Batch · Red Hat · 2026-06-25 · 13 CVEs total

CVE-2026-12975 8.5 HIGH Apicurio/apicurio-registry: apicurio-registry: unhardened saxparser in content-type detect
CVE-2026-9800 8.1 HIGH Keycloak-policy-enforcer: keycloak policy enforcer: authorization bypass via incorrect uri
CVE-2026-11800 8.1 HIGH Org.keycloak:keycloak-services: keycloak: authentication bypass via jwt algorithm confusio
CVE-2026-12992 7.4 HIGH Apicurio/apicurio-registry: apicurio-registry: ssrf via wsdl4j import dereference in wsdl
CVE-2026-9086 7.3 HIGH Keycloak: keycloak: cross-site scripting (xss) via case-insensitive uri validation bypass
CVE-2026-13083 6.9 MEDIUM Pen-drive: pen-drive: stored xss via unescaped cluster data in html report
CVE-2026-9705 6.5 MEDIUM Keycloak: keycloak: attacker can re-enable and take over disabled clients via registration
CVE-2026-12993 6.5 MEDIUM Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via
CVE-2026-13318 6.4 MEDIUM Virt-api-rhel9: kubevirt: kubevirt: ssrf in virt-api port-forward via unvalidated guest-ag
CVE-2026-9083 4.9 MEDIUM Keycloak: keycloak: information disclosure through arbitrary filesystem path probing
CVE-2026-9799 4.6 MEDIUM Keycloak: keycloak: unauthorized access to resources via uma permission ticket bypass
CVE-2026-13218 4.2 MEDIUM Kubevirt: kubevirt: symlink following in writetocachedfile allows host file overwrite from

IV. Related Vulnerabilities

Same product: Red Hat build of Keycloak 26.4
Same vendor: Red Hat
Same weakness: CWE-639

V. Comments for CVE-2026-9099

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