{"id":"BIT-keycloak-2026-9099","summary":"Keycloak: group-admin escalation to realm-admin","details":"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.\n\nBecause 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.","aliases":["CVE-2026-9099"],"modified":"2026-09-08T08:48:06.803422479Z","published":"2026-08-25T11:42:41.994Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*","cpe:2.3:a:keycloak:keycloak:*:*:*:*:*:*:*:*"]},"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:30049"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:30050"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:30083"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:30084"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-9099"},{"type":"ADVISORY","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2480182"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9099"},{"type":"ADVISORY","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9099.json"}],"affected":[{"package":{"name":"keycloak","ecosystem":"Bitnami","purl":"pkg:bitnami/keycloak"},"ranges":[{"type":"SEMVER","events":[{"introduced":"26.4.0"},{"fixed":"26.4.13"},{"introduced":"26.6.0"},{"fixed":"26.6.4"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/keycloak/BIT-keycloak-2026-9099.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N"}]}],"schema_version":"1.9.0"}