From: Apple Product Security
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APPLE-SA-2016-05-03-1 Xcode 7.3.1

Xcode 7.3.1 is now available and addresses the following:

Git
Available for:  OS X El Capitan v10.11 and later
Impact:  A remote attacker may be able to execute arbitrary code
Description:  A heap-based buffer overflow issue existed in the
handling of filenames. [...]