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_name": "libresteasy-java", "binary_version": "3.0.6-3ubuntu0.1~esm1" } ] }
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-1051.json"