As per RHSA-2018:2942

Synopsis

Critical: java-1.8.0-openjdk security update
Type/Severity

Security Advisory: Critical
Topic

An update for java-1.8.0-openjdk is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.