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APPLE-SA-08-18-2026-1 Safari 26.6.1

Safari 26.6.1 addresses the following issues.
Information about the security content is also available at
https://support.apple.com/148286.

Apple maintains a Security Releases page at
https://support.apple.com/100100 which lists recent
software updates with security advisories.

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.

Safari 26.6.1 may be obtained from the Mac App Store.

All information is also posted on the Apple Security Releases
web site: https://support.apple.com/100100.

This message is signed with Apple's Product Security PGP key,
and details are available at:
https://www.apple.com/support/security/pgp/

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