Requests (aka python-requests) before 2.3.0 allows remote servers to obtain a netrc password by reading the Authorization header in a redirected request.
http://advisories.mageia.org/MGASA-2014-0409.html
http://www.debian.org/security/2015/dsa-3146
http://www.mandriva.com/security/advisories?name=MDVSA-2015:133
http://www.ubuntu.com/usn/USN-2382-1