macOS Tahoe 26.6 Security Update

What macOS Tahoe 26.6 Fixes

macOS Tahoe 26.6, released July 27, 2026, fixes 170 vulnerabilities in 80 parts of the system, according to Apple's security advisory.

Apple does not say that any of them were exploited before the fix. That makes macOS Tahoe 26.6 a routine security update: worth installing soon, not an emergency.

It has since been superseded: the newest security release for macOS Tahoe is macOS Tahoe 26.7.2, from October 26, 2026, which includes these fixes.

Grouped by us from the impact Apple gives for each fix; the impact lines below are Apple's own.

Which Devices Get macOS Tahoe 26.6

Apple lists macOS Tahoe 26.6 for: macOS Tahoe.

The macOS Tahoe 26.6 release page has its build numbers and release history.

How to Install macOS Tahoe 26.6

On the Mac, open System Settings → General → Software Update. Macs that cannot run the newest macOS are offered the update for their own version there.

Security fixes are cumulative: any later release for the same version includes these as well, so if you are already past macOS Tahoe 26.6 there is nothing to do.

Every Fix in macOS Tahoe 26.6

All 170 CVEs in Apple's advisory, the most serious kinds first. Each entry is the part of the system affected, Apple's description of the impact and the fix, and the CVE ID.

• AppleDouble

  Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-43776

• AVEVideoEncoder

  An app may be able to execute arbitrary code with kernel privileges

  A buffer overflow was addressed with improved size validation.

  CVE-2026-64747

• HFS

  Processing a maliciously crafted image may lead to arbitrary code execution

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-28981

• ImageIO

  Processing a maliciously crafted image may lead to arbitrary code execution

  An integer overflow was addressed with improved input validation.

  CVE-2026-43818

• SceneKit

  Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution

  An integer overflow was addressed with improved input validation.

  CVE-2026-64766 CVE-2026-64765

• SceneKit

  Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-64764

• SceneKit

  Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution

  An out-of-bounds write issue was addressed by removing the vulnerable code.

  CVE-2026-64763

• Wi‑Fi

  An app may be able to execute arbitrary code out of its sandbox or with certain elevated privileges

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-43750

• Accounts

  An app may be able to gain root privileges

  A parsing issue in the handling of directory paths was addressed with improved path validation.

  CVE-2026-43749

• afpfs

  A remote attacker may be able to cause unexpected system termination or corrupt kernel memory

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-64767

• afpfs

  Connecting to a malicious afpfs server may lead to kernel memory corruption

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-43815

• APFS

  A remote user may be able to cause unexpected system termination or corrupt kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-64695

• Apple Account

  A malicious app may be able to break out of its sandbox

  An authorization issue was addressed with improved state management.

  CVE-2026-64737

• AppleRAID

  A local user may be able to read kernel memory

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-43681

• ATS

  An app may be able to read files outside of its sandbox

  A permissions issue was addressed by removing the vulnerable code.

  CVE-2026-43763

• Audio

  An app may be able to break out of its sandbox

  An access issue was addressed with additional sandbox restrictions.

  CVE-2026-64702

• cd9660

  An app may be able to cause unexpected system termination or read kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-64698

• Core Services

  An app may be able to gain root privileges

  A race condition was addressed with improved state handling.

  CVE-2026-43693

• CUPS

  A malicious app may be able to gain root privileges

  A permissions issue was addressed with additional restrictions.

  CVE-2026-39875 CVE-2026-64701

• DesktopServices

  A malicious app may be able to gain root privileges

  A race condition was addressed with improved locking.

  CVE-2026-43783

• Disk Images

  An app may be able to disclose kernel memory

  The issue was addressed with improved bounds checks.

  CVE-2026-64776

• Game Center

  A malicious app may be able to break out of its sandbox

  A parsing issue in the handling of directory paths was addressed with improved path validation.

  CVE-2026-64740

• HFS

  A remote user may be able to cause unexpected system termination or corrupt kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-43682

• HFS

  Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-43773

• HFS

  An app may be able to cause unexpected system termination or corrupt kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-64697

• HFS

  An attacker may be able to cause unexpected system termination or corrupt kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-43710

• HFS

  An app may be able to cause unexpected system termination or write kernel memory

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-64705

• IOKit

  An app may be able to cause unexpected system termination or write kernel memory

  A race condition was addressed with improved state handling.

  CVE-2026-43805

• Kernel

  An app may be able to cause unexpected system termination or corrupt kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-64749

• Kernel

  An app may be able to disclose kernel memory

  An information leakage was addressed with additional validation.

  CVE-2026-64744

• Kernel

  An app may be able to cause unexpected system termination or corrupt kernel memory

  A use after free issue was addressed with improved memory management.

  CVE-2026-43778

• Kernel

  A remote user may be able to cause unexpected system termination or corrupt kernel memory

  A race condition was addressed with improved locking.

  CVE-2026-28982

• Kernel

  An app may be able to disclose kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-64709

• Kernel

  Connecting to a malicious NFS server may lead to kernel memory corruption

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-28931

• Kernel

  A remote user may be able to cause unexpected system termination or corrupt kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-43810

• Kernel

  An app may be able to cause unexpected system termination or write kernel memory

  A use after free issue was addressed with improved memory management.

  CVE-2026-64751

• Kernel

  An app may be able to cause unexpected system termination or write kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-65357

• Kernel

  An app may be able to disclose kernel memory

  This issue was addressed with improved redaction of sensitive information.

  CVE-2026-65371

• Kernel

  An app may be able to cause unexpected system termination or corrupt kernel memory

  A race condition was addressed with improved state handling.

  CVE-2026-64717

• libc

  A malicious app may be able to break out of its sandbox

  An integer overflow was addressed with improved input validation.

  CVE-2026-28973

• Maps

  A malicious app may be able to break out of its sandbox

  A permissions issue was addressed with additional restrictions.

  CVE-2026-64738

• MediaRemote

  An app may be able to gain root privileges

  A path handling issue was addressed with improved validation.

  CVE-2026-43723

• NetFSFramework

  An app may be able to break out of its sandbox

  A path traversal issue was addressed with improved input validation.

  CVE-2026-43772

• PackageKit

  A user may be able to elevate privileges

  A logic issue was addressed with improved restrictions.

  CVE-2026-28912

• Printing

  A malicious app may be able to break out of its sandbox

  A path handling issue was addressed with improved validation.

  CVE-2026-64731

• quarantine

  An app may be able to cause unexpected system termination or write kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-43694

• Remote Management

  A malicious app may be able to gain root privileges

  A permissions issue was addressed with additional restrictions.

  CVE-2026-39874

• SecurityAgent

  An app may be able to gain root privileges

  A race condition was addressed with improved state management.

  CVE-2026-43755

• WebDAV

  An app may be able to disclose kernel memory

  A memory initialization issue was addressed with improved memory handling.

  CVE-2026-64699

• WebKit

  Maliciously crafted web content may violate iframe sandboxing policy

  A permissions issue was addressed with improved validation.

  CVE-2026-64728

• WebKit

  An app may be able to read files outside of its sandbox

  An access issue was addressed with improved access restrictions.

  CVE-2026-43821

• Accounts

  An app may be able to access sensitive user data

  An access issue was addressed with additional sandbox restrictions.

  CVE-2026-43819

• App Store

  An app may be able to access sensitive user data

  This issue was addressed with improved checks.

  CVE-2026-43801

• Apple Account

  An app may be able to access sensitive user data

  A race condition was addressed with improved state handling.

  CVE-2026-43781

• Apple Account

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-65353

• Assets

  A malicious application may be able to bypass Privacy preferences

  An authorization issue was addressed with improved state management.

  CVE-2026-43672

• CloudAttestation

  A maliciously crafted app may be able to bypass code signing enforcement

  A validation issue was addressed with improved input sanitization.

  CVE-2026-43813

• Contacts

  An app may be able to add contacts without user authorization

  An authorization issue was addressed with improved validation.

  CVE-2026-64746

• Contacts

  Processing a maliciously crafted contact may leak sensitive data

  The issue was addressed with improved checks.

  CVE-2026-64734

• Contacts

  An app may be able to access information about a user's contacts

  This issue was addressed with improved checks.

  CVE-2026-43797

• Control Center

  An app may be able to access user-sensitive data

  A logic issue was addressed with improved validation.

  CVE-2026-43756

• CoreMedia

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-43775 CVE-2026-43759

• CoreServices

  An app may bypass Gatekeeper checks

  A logic issue was addressed with improved checks.

  CVE-2026-28899

• Crash Reporter

  An app may be able to leak sensitive user information

  A privacy issue was addressed by removing sensitive data.

  CVE-2026-64710

• curl

  Authentication credentials may be sent to a server on another origin

  This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org .

  CVE-2026-3784 CVE-2026-3783

• Data Detectors UI

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-43758

• DesktopServices

  An app may bypass Gatekeeper checks

  A file quarantine bypass was addressed with additional checks.

  CVE-2026-64708

• Disk Images

  An app may be able to bypass network restrictions

  A permissions issue was addressed with additional sandbox restrictions.

  CVE-2026-28945

• DriverKit

  An attacker with physical access to a locked device may be able to view sensitive user information

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-43753

• Foundation

  A malicious app may be able to access protected user data

  The issue was addressed with improved input sanitization.

  CVE-2026-43714

• Game Center

  An app may be able to access sensitive user data

  This issue was addressed with improved data protection.

  CVE-2026-43796

• Kernel

  An app may be able to access sensitive user data

  This issue was addressed with improved checks.

  CVE-2026-43782

• Kernel

  A remote attacker may be able to bypass network filters

  An inconsistent user interface issue was addressed with improved state management.

  CVE-2026-64735

• Kernel

  An app may be able to access sensitive user data

  A logic issue was addressed with improved checks.

  CVE-2026-64723

• Kernel

  An app may be able to leak sensitive kernel state

  This issue was addressed with improved redaction of sensitive information.

  CVE-2026-43754

• Kernel

  An app may be able to access sensitive user data

  This issue was addressed through improved state management.

  CVE-2026-64721

• LoginWindow

  An attacker with physical access to a locked device may be able to view sensitive user information

  An authorization issue was addressed with improved state management.

  CVE-2026-43766

• Managed Configuration

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-64743

• NSColorPanel

  An app may be able to leak sensitive user information

  This issue was addressed with additional entitlement checks.

  CVE-2026-64711

• Safari

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-43792

• Screen Sharing Server

  An app may be able to access user-sensitive data

  An access issue was addressed with improved access restrictions.

  CVE-2026-43760

• Security

  An attacker may be able to modify the state of the Keychain

  This issue was addressed through improved state management.

  CVE-2026-43728

• Single Sign-On

  An app may be able to access user-sensitive data

  The issue was addressed with improved checks.

  CVE-2026-43762

• Siri

  A person with physical access to a locked device may be able to access contacts and photos

  This issue was addressed with additional restrictions on the lock screen.

  CVE-2026-64745

• Siri

  An app may be able to access sensitive user data

  An information disclosure issue was addressed by removing the vulnerable code.

  CVE-2026-43800

• Spotlight

  An app may be able to access sensitive user data

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-43774

• StorageKit

  An app may be able to access sensitive user data

  A race condition was addressed with additional validation.

  CVE-2026-43770

• Virtualization

  An app may be able to access protected user data

  A race condition was addressed with additional validation.

  CVE-2026-84562

• WebKit

  Visiting a website that frames malicious content may lead to UI spoofing

  The issue was addressed with improved UI.

  CVE-2026-64730

• apache

  A remote attacker may be able to cause a denial-of-service

  This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org .

  CVE-2026-23918

• Apple Neural Engine

  An app may be able to cause unexpected system termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-43748

• Apple Neural Engine

  An app may be able to cause unexpected system termination

  A use after free issue was addressed with improved memory management.

  CVE-2026-28928

• AppleAVD

  An app may be able to cause unexpected system termination

  A use after free issue was addressed with improved memory management.

  CVE-2026-65407

• AppleRAID

  Mounting a malicious disk image may cause unexpected system termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-43761

• Audio

  An app may be able to cause a denial-of-service

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-64725

• AVEVideoEncoder

  An app may be able to cause unexpected system termination

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-64762

• CoreAudio

  Processing a maliciously crafted audio file may corrupt process memory

  The issue was addressed with improved memory handling.

  CVE-2026-43673

• CoreAudio

  A remote attacker may be able to cause unexpected system termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-43803

• CoreMedia

  Processing a maliciously crafted video file may lead to unexpected app termination

  A memory corruption issue was addressed with improved memory handling.

  CVE-2026-43711

• CoreMedia Video Toolbox

  Processing a maliciously crafted video file may lead to unexpected app termination or corrupt process memory

  The issue was addressed with improved memory handling.

  CVE-2026-43702

• CoreVideo

  An app may be able to cause unexpected system termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-43802

• Disk Images

  An app may be able to cause unexpected system termination

  An integer overflow was addressed with improved input validation.

  CVE-2026-64694

• Disk Images

  Parsing a maliciously crafted file may lead to an unexpected app termination

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-43747

• DriverKit

  An app may be able to cause unexpected system termination

  An issue existed in the handling of environment variables. This issue was addressed with improved validation.

  CVE-2026-43793

• GPU Drivers

  An app may be able to cause unexpected system termination

  A buffer overflow was addressed with improved size validation.

  CVE-2026-64691

• Heimdal

  An app may be able to cause a denial-of-service

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-64692

• HFS

  An app may be able to cause unexpected system termination

  The issue was addressed with improved memory handling.

  CVE-2026-43767

• HFS

  An app may be able to cause unexpected system termination

  An integer overflow was addressed with improved input validation.

  CVE-2026-43764

• ImageIO

  Processing a maliciously crafted texture may lead to unexpected app termination

  An integer overflow was addressed with improved input validation.

  CVE-2026-43780

• ImageIO

  Processing a maliciously crafted image may corrupt process memory

  The issue was addressed with improved memory handling.

  CVE-2026-64716

• ImageIO

  Processing a maliciously crafted file may lead to unexpected app termination

  The issue was addressed with improved bounds checks.

  CVE-2026-64758

• ImageIO

  Processing a maliciously crafted file may lead to a denial-of-service

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-64754

• ImageIO

  Processing a maliciously crafted image may lead to a denial-of-service

  A type confusion issue was addressed with improved checks.

  CVE-2026-64693

• Kernel

  An app may be able to cause unexpected system termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-43739 CVE-2026-43816

• Kernel

  An app may be able to cause unexpected system termination

  A use after free issue was addressed with improved memory management.

  CVE-2026-43822 CVE-2026-64729 CVE-2026-43814 CVE-2026-64700 CVE-2026-43799

• Kernel

  An app may be able to cause unexpected system termination

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-43817 CVE-2026-43809 CVE-2026-43757

• Kernel

  An app may be able to cause unexpected system termination

  An integer overflow was addressed with improved input validation.

  CVE-2026-43769

• Kernel

  An app may be able to cause unexpected system termination

  A type confusion issue was addressed with improved memory handling.

  CVE-2026-64727

• Kernel

  An app may be able to cause unexpected system termination

  A memory initialization issue was addressed with improved memory handling.

  CVE-2026-64775

• Kernel

  An app may be able to cause unexpected system termination

  A race condition was addressed with improved state handling.

  CVE-2026-64720

• Kernel

  An app may be able to cause unexpected system termination

  A use-after-free issue was addressed with improved memory management.

  CVE-2026-43808

• Libnotify

  An attacker may be able to cause unexpected app termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-64739

• mDNSResponder

  A local attacker may be able to cause a denial of service

  A denial of service issue was addressed by removing the vulnerable code.

  CVE-2026-43806

• mDNSResponder

  An attacker on the local network may be able to cause a denial-of-service

  The issue was addressed with improved memory handling.

  CVE-2026-64724

• Metal

  A malicious app may be able to corrupt memory of a system process

  The issue was addressed with improved memory handling.

  CVE-2026-28911

• Model I/O

  Processing a maliciously crafted image may corrupt process memory

  The issue was addressed with improved memory handling.

  CVE-2026-43733 CVE-2026-43729

• Model I/O

  A remote attacker may be able to cause unexpected application termination or heap corruption

  An out-of-bounds write issue was addressed with improved input validation.

  CVE-2026-64772

• Model I/O

  A remote attacker may be able to cause unexpected application termination or heap corruption

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-64771

• Model I/O

  A remote attacker may be able to cause unexpected application termination or heap corruption

  An integer overflow was addressed with improved input validation.

  CVE-2026-64774

• Model I/O

  A remote attacker may be able to cause unexpected application termination or heap corruption

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-64770 CVE-2026-64769

• Model I/O

  A remote attacker may cause an unexpected app termination

  An out-of-bounds read issue was addressed with improved input validation.

  CVE-2026-64768

• Net-SNMP

  An app may be able to cause a denial-of-service

  A stack overflow was addressed with improved input validation.

  CVE-2026-43771

• ppp

  An app may be able to cause unexpected system termination

  A use-after-free issue was addressed with improved memory management.

  CVE-2026-28933

• Pro Res

  An app may be able to cause unexpected system termination

  A use after free issue was addressed with improved memory management.

  CVE-2026-43812

• Screen Sharing Server

  A remote attacker may be able to cause a denial of service

  This issue was addressed with improved input validation.

  CVE-2026-43777

• SMB

  Connecting to a malicious SMB server may lead to unexpected system termination

  The issue was addressed with improved memory handling.

  CVE-2026-39873 CVE-2026-64696

• SMB

  An app may be able to cause unexpected system termination

  A type confusion issue was addressed with improved memory handling.

  CVE-2026-64704

• udf

  An app may be able to cause unexpected system termination

  The issue was addressed with improved memory handling.

  CVE-2026-43768

• WebDAV

  An app may be able to cause a denial-of-service

  A use after free issue was addressed with improved memory management.

  CVE-2026-64703

• WebDAV

  An app may be able to cause unexpected system termination

  The issue was addressed with improved authentication.

  CVE-2026-65375

• WebKit

  Processing maliciously crafted web content may lead to an unexpected Safari crash

  A use-after-free issue was addressed with improved memory management.

  CVE-2026-64783

• WebKit

  Processing maliciously crafted web content may lead to an unexpected Safari crash

  A memory corruption issue was addressed with improved state management.

  CVE-2026-64757

• WebKit

  Visiting a website may lead to an app denial-of-service

  This issue was addressed through improved state management.

  CVE-2026-43804

• WebKit Canvas

  Processing maliciously crafted web content may lead to an unexpected Safari crash

  A use-after-free issue was addressed with improved memory management.

  CVE-2026-64718

• WebRTC

  Processing maliciously crafted web content may lead to an unexpected Safari crash

  An out-of-bounds access issue was addressed with improved bounds checking.

  CVE-2026-64719

• Wi-Fi

  An attacker in physical proximity may be able to corrupt process memory

  The issue was addressed with improved memory handling.

  CVE-2026-64726

• xar

  An app may be able to cause a denial of service

  A logic issue existed resulting in memory corruption. This was addressed with improved state management.

  CVE-2026-28932

• Accounts Framework

  An app may be able to fingerprint the user

  This issue was addressed with improved data protection.

  CVE-2026-64733

• AuthKit

  An app may be able to fingerprint the user

  A permissions issue was addressed with additional restrictions.

  CVE-2026-43730

• BackgroundAssets

  An app may be able to delete files for which it does not have permission

  A permissions issue was addressed with improved validation.

  CVE-2026-64707

• CoreAudio

  Processing an audio stream in a maliciously crafted media file may terminate the process

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-43744

• libarchive

  Processing a maliciously crafted file may result in disclosure of process memory

  This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org .

  CVE-2026-4424

• Model I/O

  Processing a 3D model may result in disclosure of process memory

  A buffer overflow issue was addressed with improved memory handling.

  CVE-2026-64722

• PackageKit

  An app may be able to modify protected parts of the file system

  This issue was addressed with improved handling of symlinks.

  CVE-2026-43765

• Screen Sharing Server

  An app may be able to intercept network connections intended for another process

  A logic issue was addressed with improved restrictions.

  CVE-2026-43779

• WebKit

  Websites may know if the user has visited a given link

  This issue was addressed with improved checks.

  CVE-2026-64713

macOS Tahoe Security Release History

macOS Tahoe 26.6 in context: the security releases Apple has published for macOS Tahoe, newest first, with the number of fixes each carried.

The Same Fixes Elsewhere

Apple ships most fixes to every platform that shares the code, and to older versions still under support. These releases close at least one of the same CVEs:

Frequently Asked Questions