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.
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "nodejs-doc": "12.22.9~dfsg-1ubuntu3", "libnode72": "12.22.9~dfsg-1ubuntu3", "nodejs": "12.22.9~dfsg-1ubuntu3", "libnode-dev": "12.22.9~dfsg-1ubuntu3", "libnode72-dbgsym": "12.22.9~dfsg-1ubuntu3", "nodejs-dbgsym": "12.22.9~dfsg-1ubuntu3" } ] }