About the security content of Safari 26.6.1
This update delivers security fixes that were first made available in the macOS Golden Gate 27 beta. This document describes the security content of Safari 26.6.1.
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 releases page.
Apple security documents reference vulnerabilities by CVE-ID when possible.
For more information about security, see the Apple Product Security page.
Safari 26.6.1
Released August 18, 2026
WebKit
Available for: macOS Sonoma and macOS Sequoia
Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash
Description: An out-of-bounds access issue was addressed with improved bounds checking.
WebKit Bugzilla: 317632
CVE-2026-64784: Janggoon Lee of Out of Bounds, OpenAI Codex Security - Amy Burnett
WebKit
Available for: macOS Sonoma and macOS Sequoia
Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash
Description: The issue was addressed with improved memory handling.
WebKit Bugzilla: 313452
CVE-2026-43795: wwwlk
WebKit Bugzilla: 318348
CVE-2026-65338: OpenAI Codex Security - Amy Burnett
WebKit
Available for: macOS Sonoma and macOS Sequoia
Impact: Processing maliciously crafted web content may lead to memory corruption
Description: The issue was addressed with improved memory handling.
WebKit Bugzilla: 318405
CVE-2026-65341: Henock Habte
WebKit
Available for: macOS Sonoma and macOS Sequoia
Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash
Description: A memory corruption vulnerability was addressed with improved locking.
WebKit Bugzilla: 321480
CVE-2026-64782: Seonwook Kim, Shubham Chaskar, lattice, Josef Korbel
WebKit
Available for: macOS Sonoma and macOS Sequoia
Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash
Description: The issue was addressed with improved input validation.
WebKit Bugzilla: 321484
CVE-2026-64781: Thomas Guillem
WebKit
Available for: macOS Sonoma and macOS Sequoia
Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash
Description: This issue was addressed through improved state management.
WebKit Bugzilla: 321517
CVE-2026-65351: Niels Hofmans
WebKit Bugzilla: 316996
CVE-2026-65340: Claudio Bozzato and Francesco Benvenuto of Cisco Talos, Josef Korbel (Citadelo)
WebKit Bugzilla: 317142
CVE-2026-65337: OpenAI Codex Security - Amy Burnett
WebKit Bugzilla: 317349
CVE-2026-65336: Josef Korbel
WebKit Bugzilla: 316723
CVE-2026-65335: OpenAI Codex Security - Amy Burnett
WebKit Bugzilla: 317603
CVE-2026-65333: OpenAI Codex Security - Amy Burnett
WebKit Bugzilla: 317450
CVE-2026-65332: OpenAI Codex Security - Amy Burnett
WebKit Bugzilla: 317611
CVE-2026-65331: OpenAI Codex Security - Amy Burnett
WebKit
Available for: macOS Sonoma and macOS Sequoia
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: A use-after-free issue was addressed with improved memory management.
WebKit Bugzilla: 316347
CVE-2026-64715: Hossein Lotfi (@hosselot) of TrendAI Zero Day Initiative
WebKit
Available for: macOS Sonoma and macOS Sequoia
Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash
Description: The issue was addressed with improved checks.
WebKit Bugzilla: 316918
CVE-2026-64780: OpenAI Codex Security - Amy Burnett
WebKit
Available for: macOS Sonoma and macOS Sequoia
Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash
Description: A memory corruption issue was addressed with improved state management.
WebKit Bugzilla: 316791
CVE-2026-65334: OpenAI Codex Security - Amy Burnett
WebKit
Available for: macOS Sonoma and macOS Sequoia
Impact: Processing maliciously crafted web content may lead to memory corruption
Description: A memory corruption issue was addressed with improved memory handling.
WebKit Bugzilla: 317317
CVE-2026-43794: Dung Do (@_piers2) of Calif.io
WebKit
Available for: macOS Sonoma and macOS Sequoia
Impact: Processing maliciously crafted web content may lead to an unexpected process termination
Description: A use-after-free issue was addressed with improved memory management.
WebKit Bugzilla: 313703
CVE-2026-64787: 杉山 壮太, Shubham Chaskar
WebKit History
Available for: macOS Sonoma and macOS Sequoia
Impact: Visiting a maliciously crafted website may leak sensitive data
Description: The issue was addressed with improved checks.
WebKit Bugzilla: 315528
CVE-2026-64778: Mohit Negi
WebKit Storage
Available for: macOS Sonoma and macOS Sequoia
Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash
Description: A memory corruption vulnerability was addressed with improved locking.
WebKit Bugzilla: 321485
CVE-2026-64779: Shubham Chaskar, Tommy DeVoss from Braze Security Team (@thedawgyg)
Additional recognition
WebKit
We would like to acknowledge Henock Habte for their assistance.
Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. Contact the vendor for additional information.