About the security content of macOS Sequoia 15.8.1
This document describes the security content of macOS Sequoia 15.8.1.
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macOS Sequoia 15.8.1
Released September 28, 2026
CoreGraphics
Available for: macOS Sequoia
Impact: Processing a maliciously crafted file may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 27.
Description: An out-of-bounds write issue was addressed with improved bounds checking.
CVE-2026-86950: Meta Product Security
Contact the vendor for additional information.