Red Hat Security Advisory 2019-1140-01 - Red Hat Single Sign-On 7.3 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications. This release of Red Hat Single Sign-On 7.3.1 serves as a replacement for Red Hat Single Sign-On 7.3.0, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References. Issues addressed include a deserialization vulnerability.

Source: Red Hat Security Advisory 2019-1140-01