Nokogiri version 1.7.1 has been released, pulling in several upstream
patches to the vendored libxml2 to address the following CVEs:
CVE-2016-4658
CVSS v3 Base Score: 9.8 (Critical)
libxml2 in Apple iOS before 10, OS X before 10.12, tvOS before 10, and
watchOS before 3 allows remote attackers to execute arbitrary code or cause
a denial of service (memory corruption) via a crafted XML document.
CVE-2016-5131
CVSS v3 Base Score: 8.8 (HIGH)
Use-after-free vulnerability in libxml2 through 2.9.4, as used in Google
Chrome before 52.0.2743.82, allows remote attackers to cause a denial of
service or possibly have unspecified other impact via vectors related to
the XPointer range-to function.