Web endpoint authentication check is broken in Apache Hadoop 3.0.0-alpha4, 3.0.0-beta1, and 3.0.0. Authenticated users may impersonate any user even if no proxy user is configured.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "3.0.0-NA"
},
{
"introduced": "0"
},
{
"last_affected": "3.0.0-alpha4"
},
{
"introduced": "0"
},
{
"last_affected": "3.0.0-beta1"
}
]
}