The http_negotiate_create_context function in protocol/http/http_negotiate.c in ELinks 0.12 before 0.12pre6, when using HTTP Negotiate or GSS-Negotiate authentication, delegates user credentials through GSSAPI, which allows remote servers to authenticate as the client via the delegated credentials.
https://exchange.xforce.ibmcloud.com/vulnerabilities/80882
http://www.securityfocus.com/bid/57065
http://www.mandriva.com/security/advisories?name=MDVSA-2013:075
http://www.debian.org/security/2012/dsa-2592
http://secunia.com/advisories/51569