curl before version 7.52.0 is vulnerable to a buffer overflow when doing a large floating point output in libcurl's implementation of the printf() functions. If there are any application that accepts a format string from the outside without necessary input filtering, it could allow remote attacks.
https://security.gentoo.org/glsa/201701-47
https://github.com/curl/curl/commit/curl-7_51_0-162-g3ab3c16
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9586