CVE-2026-9099A flaw was found in Keycloak.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.7 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
redhat build_of_keycloak redhat:build_of_keycloak | from 26.4 before 26.4.13; from 26.6 before 26.6.4 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:30049third-party-advisory
- https://access.redhat.com/errata/RHSA-2026:30050third-party-advisory
- https://access.redhat.com/errata/RHSA-2026:30083third-party-advisory
- https://access.redhat.com/errata/RHSA-2026:30084third-party-advisory
- https://access.redhat.com/security/cve/CVE-2026-9099third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2480182third-party-advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9099.jsonthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.