About the security content of Safari 16.3

This document describes the security content of Safari 16.3.

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Safari 16.3*

Released February 13, 2023

WebKit

Available for: macOS Big Sur and macOS Monterey

Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

Description: A type confusion issue was addressed with improved checks.

WebKit Bugzilla: 251944
CVE-2023-23529: an anonymous researcher

• After installing this update, the build number for Safari 16.3 is 167614.4.6.11.6 on macOS Big Sur and 177614.4.6.11.6 on macOS Monterey.

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Published Date: February 14, 2023