The parse function in llhttp < 2.1.4 and < 6.0.6. ignores chunk extensions when parsing the body of chunked requests. This leads to HTTP Request Smuggling (HRS) under certain conditions.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "20.3.4"
},
{
"introduced": "0"
},
{
"last_affected": "21.3.0"
}
]
}