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.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "3.0.22"
},
{
"introduced": "0"
},
{
"last_affected": "3.1.2"
}
]
}