This document describes the security content of Xcode 26.4.
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 releases page.
Apple security documents reference vulnerabilities by CVE-ID when possible.
For more information about security, see the Apple Product Security page.
Released March 24, 2026
Available for: macOS Tahoe 26.2 and later
Impact: An app may be able to cause unexpected system termination
Description: An out-of-bounds read was addressed with improved bounds checking.
CVE-2026-28890: Nathaniel Oh (@calysteon)
Available for: macOS Tahoe 26.2 and later
Impact: An app may be able to read arbitrary files as root
Description: A permissions issue was addressed with additional restrictions.
CVE-2026-28889: Mihai Marin
We would like to acknowledge Nathaniel Oh (@calysteon) for their assistance.
We would like to acknowledge Eddy T for their assistance.
We would like to acknowledge Banavath Aravind for their assistance.