About the security content of Xcode 11.3

This document describes the security content of Xcode 11.3.

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Xcode 11.3

Released December 10, 2019


Available for: macOS Mojave 10.14.4 and later

Impact: Compiling with untrusted sources may lead to arbitrary code execution with user privileges

Description: An out-of-bounds read was addressed with improved bounds checking.

CVE-2019-8840: Pan ZhenPeng (@Peterpan0927) of Qihoo 360 Nirvan Team

Additional recognition


We would like to acknowledge David Stone of Uber ATC for their assistance.

Entry updated February 3, 2020

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