It was found that the fix for CVE-2016-9606 in versions 3.0.22 and 3.1.2 was incomplete and Yaml unmarshalling in Resteasy is still possible via Yaml.load() in YamlProvider.
Yaml.load()
{ "binaries": [ { "binary_version": "3.0.6-3ubuntu0.1~esm1", "binary_name": "libresteasy-java" } ] }