Red Hat Lightwell has released ognl:ognl 3.0.8.rhlw-00002 with a backported security fix.
CVE-2016-3093: Apache Struts 2.0.0 through 2.3.24.1 does not properly cache method references when used with OGNL before 3.0.12, which allows remote attackers to cause a denial of service (block access to a web site) via unspecified vectors.
This patched artifact is a drop-in replacement for ognl:ognl 3.0.8 from Maven Central.