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://lists.debian.org/debian-lts-announce/2018/11/msg00005.html
https://github.com/curl/curl/commit/curl-7_51_0-162-g3ab3c16
https://curl.haxx.se/docs/adv_20161221A.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9586
https://access.redhat.com/errata/RHSA-2018:3558
http://www.securitytracker.com/id/1037515
http://www.securityfocus.com/bid/95019
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html