CVE-2017-12159: Keycloak

High severity, CVSS 7.5. EPSS: 2.7% chance of exploitation in the next 30 days.

It was found that the cookie used for CSRF prevention in Keycloak was not unique to each session. An attacker could use this flaw to gain access to an authenticated user session, leading to possible information disclosure or further attacks.

Affected products

• Keycloak Keycloak: affected versions not specified
• Red Hat Single Sign On: version 7.0 only; version 7.1 only

Published 2017-10-26. Last modified 2026-06-17.