The issue appears to be that JBoss EAP 6.4.21 does not parse the field-name in accordance to RFC7230[1] as it returns a 200 instead of a 400.. A flaw was discovered in JBoss EAP, where it does not process the header field-name in accordance with RFC7230. Whitespace between the header field-name and colon is processed, resulting in an HTTP response code of 200 instead of a bad request of 400.
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