Zcash 2.x allows an inexpensive approach to "fill all transactions of all blocks" and "prevent any real transaction from occurring" via a "Sapling Wood-Chipper" attack.
{
"extracted_events": [
{
"cpe": "cpe:2.3:a:z.cash:zcash:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.0.0"
},
{
"last_affected": "2.0.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:z.cash:zcash:2.0.5:rc1:*:*:*:*:*:*",
"range": [
{
"introduced": "2.0.5-rc1"
},
{
"last_affected": "2.0.5-rc1"
}
],
"source": "CPE_STRING"
}
]
}