CHUNK-EXT-CR


Test ID	`SMUG-CHUNK-EXT-CR`
Category	Smuggling
RFC	RFC 9112 §7.1.1, RFC 9112 §2.2
Requirement	MUST reject malformed chunk line
Expected	`400` or close

What it sends

A chunk-size line where a bare CR appears inside the extension area, not as a valid CRLF terminator.

POST / HTTP/1.1\r\n
Host: localhost:8080\r\n
Transfer-Encoding: chunked\r\n
\r\n
5;a\rX\r\n
hello\r\n
0\r\n
\r\n

Differential handling of bare CR in framing metadata can produce parser disagreement across hops and create desync risk.