Incorrect authorization in Keycloak - CVE-2026-18572
Published: August 2, 2026 / Updated: September 5, 2026
Vulnerability identifier: #VU146979
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-18572
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass time-based authorization restrictions.
The vulnerability exists due to incorrect authorization in Keycloak authorization services when processing authorization requests containing a user-supplied time value. A remote user can include a fake time value in an authorization request to bypass time-based authorization restrictions.
Affected software
Keycloak
How to mitigate CVE-2026-18572
Install security update from vendor's website.
Keycloak - update to 26.7.3