The parser in accepts requests with a space (SP) right after the header name before the colon. This can lead to HTTP Request Smuggling (HRS) in llhttp < v2.1.4 and < v6.0.6.
{
"binaries": [
{
"binary_version": "12.22.9~dfsg-1ubuntu3",
"binary_name": "libnode-dev"
},
{
"binary_version": "12.22.9~dfsg-1ubuntu3",
"binary_name": "libnode72"
},
{
"binary_version": "12.22.9~dfsg-1ubuntu3",
"binary_name": "libnode72-dbgsym"
},
{
"binary_version": "12.22.9~dfsg-1ubuntu3",
"binary_name": "nodejs"
},
{
"binary_version": "12.22.9~dfsg-1ubuntu3",
"binary_name": "nodejs-dbgsym"
},
{
"binary_version": "12.22.9~dfsg-1ubuntu3",
"binary_name": "nodejs-doc"
}
],
"availability": "No subscription required"
}