About Apple security updates
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 updates page.
Apple security documents reference vulnerabilities by CVE-ID when possible.
For more information about security, see the Apple Product Security page.

Safari 15.3
Released January 26, 2022
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: A use after free issue was addressed with improved memory management.
CVE-2022-22590: Toan Pham from Team Orca of Sea Security (security.sea.com)
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing maliciously crafted web content may prevent Content Security Policy from being enforced
Description: A logic issue was addressed with improved state management.
CVE-2022-22592: Prakash (@1lastBr3ath)
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing a maliciously crafted mail message may lead to running arbitrary javascript
Description: A validation issue was addressed with improved input sanitization.
CVE-2022-22589: Heige of KnownSec 404 Team (knownsec.com) and Bo Qu of Palo Alto Networks (paloaltonetworks.com)
WebKit Storage
Available for: macOS Big Sur and macOS Catalina
Impact: A website may be able to track sensitive user information
Description: A cross-origin issue in the IndexDB API was addressed with improved input validation.
CVE-2022-22594: Martin Bajanik of FingerprintJS
Additional recognition
WebKit
We would like to acknowledge Prakash (@1lastBr3ath) for their assistance.