cbcvebase.
CVE-2026-9099
published 2026-06-25

CVE-2026-9099: A flaw was found in Keycloak. A missing authorization check in the GroupResource.addChild() endpoint within the Admin REST API allows an authenticated user…

PriorityP352high7.7CVSS 3.1
AVNACHPRHUINSCCHIHAN
EPSS
0.49%
41.8th percentile
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.

Affected

6 ranges
VendorProductVersion rangeFixed in
redhatbuild_of_keycloak>= 26.4 < 26.4.1326.4.13
redhatbuild_of_keycloak>= 26.6 < 26.6.426.6.4
rhbkkeycloak-operator-bundle_26.6.4-2——
rhbkkeycloak-rhel9——
rhbkkeycloak-rhel9-operator_26.6-8——
rhbkkeycloak-rhel9_26.6-8——

CVSS provenance

nvdv3.17.7HIGHCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
vendor_redhat7.7HIGH
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