lib/oauth/consumer.rb in the oauth-ruby gem through 0.5.4 for Ruby does not verify server X.509 certificates if a certificate bundle cannot be found, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information.
{ "versions": [ { "introduced": "0" }, { "last_affected": "0.5.4" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-11086.json"