About Apple security updates
For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.
Apple security documents reference vulnerabilities by CVE-ID when possible.
Released October 27, 2016
IDE Xcode Server
Available for: OS X El Capitan v10.11.5 and later
Impact: A remote attacker may be able to cause unexpected application termination or arbitrary code execution
Description: Multiple issues existed in Node.js in Xcode Server. These issues were addressed by updating to Node.js version 4.5.0.