Missing Authorization in Keycloak - CVE-2026-16106
Published: July 17, 2026 / Updated: September 5, 2026
Vulnerability identifier: #VU146971
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-16106
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to remove privileged roles they are not authorized to manage.
The vulnerability exists due to missing authorization checks in the admin REST API when removing a child role from a composite role. A remote privileged user can remove a child role from a composite role to remove privileged roles they are not authorized to manage.
Affected software
Keycloak
How to mitigate CVE-2026-16106
Install security update from vendor's website.
Keycloak - update to 26.7.3