Missing Authorization in Keycloak - CVE-2026-18201
Published: July 29, 2026 / Updated: September 5, 2026
Vulnerability identifier: #VU146975
CSH Severity: Low
CVSS v4: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-18201
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to influence how users log into specific organizations.
The vulnerability exists due to missing authorization in the administrative API when linking a new identity provider to an organization. A remote privileged user can link a new identity provider to an organization without permission to manage that organization to influence how users log into specific organizations.
Affected software
Keycloak
How to mitigate CVE-2026-18201
Install security update from vendor's website.
Keycloak - update to 26.7.3