Couldn't find the patch number for Oracle WebLogic security finding 'Oracle WebLogic Server 10.3.6.0
Received a Oracle WebLogic security finding and the finding is below. I am using Oracle WebLogic 12.2.1.0.0
Finding: Oracle WebLogic Server 10.3.6.0 / 12.1.3.0 / 12.2.1.3 Java Object Deserialization RCE (CVE-2018-3191)
I tried applying the patch # 26519400 and it says 'Skip patch 26519400 from list of patches to apply: This patch is not needed.'
Please tell me how do i identify the correct patch number.