CRLF injection vulnerability in the url_parse function in url.c in Wget through 1.19.1 allows remote attackers to inject arbitrary HTTP headers via CRLF sequences in the host subcomponent of a URL.
https://security.gentoo.org/glsa/201706-16
http://www.securityfocus.com/bid/96877
http://lists.gnu.org/archive/html/bug-wget/2017-03/msg00018.html
http://git.savannah.gnu.org/cgit/wget.git/commit/?id=4d729e322fae359a1aefaafec1144764a54e8ad4