macOS Tahoe 26.4 Security Update

What macOS Tahoe 26.4 Fixes

macOS Tahoe 26.4, released March 24, 2026, fixes 86 vulnerabilities in 52 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 26.4 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It has since been superseded: the newest security release for macOS Tahoe is macOS Tahoe 26.7.2, from October 26, 2026, which includes these fixes.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 26.4

Apple lists macOS Tahoe 26.4 for: macOS Tahoe.

How to Install macOS Tahoe 26.4

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 26.4 there is nothing to do.

Every Fix in macOS Tahoe 26.4

All 86 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.

• 802.1X

  An attacker in a privileged network position may be able to intercept network traffic

  An authentication issue was addressed with improved state management.

  CVE-2026-28865

• Admin Framework

  An app with root privileges may be able to delete protected system files

  A path handling issue was addressed with improved validation.

  CVE-2026-28823

• CoreServices

  An app may be able to gain elevated privileges

  A validation issue existed in the entitlement verification. This issue was addressed with improved validation of the process entitlement.

  CVE-2026-28821

• CoreServices

  An app may be able to break out of its sandbox

  A permissions issue was addressed with additional sandbox restrictions.

  CVE-2026-28838

• CoreUtils

  A user in a privileged network position may be able to cause a denial-of-service

  A null pointer dereference was addressed with improved input validation.

  CVE-2026-28886

• CUPS

  An app may be able to gain root privileges

  A race condition was addressed with improved state handling.

  CVE-2026-28888

• Disk Images

  An app may be able to elevate privileges

  A race condition was addressed with improved state handling.

  CVE-2026-28926

• File System

  An app may be able to disclose kernel memory

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

  CVE-2026-28832

• Kernel

  An app may be able to disclose kernel memory

  A logging issue was addressed with improved data redaction.

  CVE-2026-28868

• Kernel

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

  The issue was addressed with improved memory handling.

  CVE-2026-20698

• Kernel

  An app may be able to determine kernel memory layout

  An information disclosure issue was addressed with improved memory management.

  CVE-2026-20695

• 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-2026-20687

• NetAuth

  An app may be able to break out of its sandbox

  A race condition was addressed with additional validation.

  CVE-2026-28891

• NetFSFramework

  An 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-2026-28827

• NSColorPanel

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

  A logic issue was addressed with improved restrictions.

  CVE-2026-28826

• PackageKit

  A user may be able to elevate privileges

  A logic issue was addressed with improved checks.

  CVE-2026-20631

• PackageKit

  An attacker with root privileges may be able to delete protected system files

  This issue was addressed through improved state management.

  CVE-2026-20693

• PackageKit

  An app may be able to gain root privileges

  A permissions issue was addressed with additional restrictions.

  CVE-2026-28840

• ppp

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

  The issue was addressed with improved memory handling.

  CVE-2026-28896

• Printing

  A sandboxed process may be able to circumvent sandbox restrictions

  A race condition was addressed with improved state handling.

  CVE-2026-28817

• Printing

  An app may be able to break out of its sandbox

  A path handling issue was addressed with improved validation.

  CVE-2026-20688

• WebKit

  A malicious website may be able to process restricted web content outside the sandbox

  The issue was addressed with improved memory handling.

  CVE-2026-28859

• Accounts

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-28877

• AppleMobileFileIntegrity

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-28824 CVE-2026-20696

• AppleMobileFileIntegrity

  An app may be able to access user-sensitive data

  A downgrade issue affecting Intel-based Mac computers was addressed with additional code-signing restrictions.

  CVE-2026-20699

• AppleScript

  An app may bypass Gatekeeper checks

  A permissions issue was addressed with additional restrictions.

  CVE-2026-20684

• Archive Utility

  An app may be able to access user-sensitive data

  This issue was addressed with improved handling of symlinks.

  CVE-2026-20633

• Clipboard

  An app may be able to access sensitive user data

  This issue was addressed with improved validation of symlinks.

  CVE-2026-28866

• curl

  An issue existed in curl which may result in unintentionally sending sensitive information via an incorrect connection

  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-2025-14524

• DeviceLink

  An app may be able to access sensitive user data

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

  CVE-2026-28876

• GeoServices

  An app may be able to access sensitive user data

  An information leakage was addressed with additional validation.

  CVE-2026-28870

• iCloud

  An app may be able to access sensitive user data

  A privacy issue was addressed by moving sensitive data.

  CVE-2026-28881

• Kernel

  An app may be able to leak sensitive kernel state

  This issue was addressed with improved authentication.

  CVE-2026-28867

• LaunchServices

  An app may be able to access protected user data

  An authorization issue was addressed with improved state management.

  CVE-2026-28845

• libxpc

  An app may be able to access protected user data

  A permissions issue was addressed with additional restrictions.

  CVE-2026-20607

• MigrationKit

  An app may be able to access user-sensitive data

  This issue was addressed with improved handling of symlinks.

  CVE-2026-20694

• Music

  An app may be able to access sensitive user data

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

  CVE-2026-20632

• NetAuth

  An app may be able to access sensitive user data

  The issue was addressed with improved checks.

  CVE-2026-28839

• Phone

  An app may be able to access user-sensitive data

  A privacy issue was addressed with improved private data redaction for log entries.

  CVE-2026-28862

• Printing

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-28831

• Security

  A local attacker may gain access to user's Keychain items

  This issue was addressed with improved permissions checking.

  CVE-2026-28864

• Security

  An app may be able to access sensitive user data

  A race condition was addressed with additional validation.

  CVE-2026-28830

• Security

  A local attacker may be able to modify the state of the Keychain

  The issue was addressed with improved input validation.

  CVE-2026-28860

• Spotlight

  An app may be able to access sensitive user data

  A logging issue was addressed with improved data redaction.

  CVE-2026-28818

• Spotlight

  An app may be able to access sensitive user data

  A permissions issue was addressed with additional restrictions.

  CVE-2026-20697

• StorageKit

  An app may be able to access sensitive user data

  This issue was addressed with improved checks.

  CVE-2026-28820

• System Settings

  An app may be able to access sensitive user data

  A logic issue was addressed with improved checks.

  CVE-2026-28837

• TCC

  An app may be able to access sensitive user data

  A permissions issue was addressed by removing the vulnerable code.

  CVE-2026-28828

• WebKit

  Processing maliciously crafted web content may bypass Same Origin Policy

  A cross-origin issue in the Navigation API was addressed with improved input validation.

  CVE-2026-20643

• WebKit

  Visiting a maliciously crafted website may lead to a cross-site scripting attack

  A logic issue was addressed with improved checks.

  CVE-2026-28871

• Audio

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

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

  CVE-2026-28879

• Audio

  An attacker may be able to cause unexpected app termination

  A type confusion issue was addressed with improved memory handling.

  CVE-2026-28822

• Calling Framework

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

  A denial-of-service issue was addressed with improved input validation.

  CVE-2026-28894

• CoreUI

  Processing a maliciously crafted file may lead to unexpected app termination

  The issue was addressed with improved checks.

  CVE-2026-20679

• GPU Drivers

  An app may be able to cause unexpected system termination

  A race condition was addressed with improved state handling.

  CVE-2026-28834

• ImageIO

  Processing a maliciously crafted file may lead to unexpected app termination

  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-2025-64505

• IOGraphics

  A buffer overflow may result in memory corruption and unexpected app termination

  The issue was addressed with improved bounds checks.

  CVE-2026-28842

• IOGraphics

  A buffer overflow may result in memory corruption and unexpected app termination

  A buffer overflow was addressed with improved size validation.

  CVE-2026-28841

• SMB

  Mounting a maliciously crafted SMB network share may lead to system termination

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

  CVE-2026-28835

• UIFoundation

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

  A stack overflow was addressed with improved input validation.

  CVE-2026-28852

• Vision

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

  A buffer overflow issue was addressed with improved memory handling.

  CVE-2026-20657

• WebKit

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

  The issue was addressed with improved memory handling.

  CVE-2026-20664 CVE-2026-28857

• apache

  Multiple issues in Apache

  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-2025-55753 CVE-2025-58098 CVE-2025-59775 CVE-2025-65082 CVE-2025-66200

• Archive Utility

  A malicious app may be able to access arbitrary files

  This issue was addressed with improved permissions checking.

  CVE-2026-28910

• CoreMedia

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

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

  CVE-2026-20690

• Crash Reporter

  An app may be able to enumerate a user's installed apps

  A privacy issue was addressed by removing sensitive data.

  CVE-2026-28878

• CUPS

  A document may be written to a temporary file when using print preview

  A privacy issue was addressed with improved handling of temporary files.

  CVE-2026-28893

• Diagnostics

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

  A permissions issue was addressed by removing the vulnerable code.

  CVE-2026-28892

• iCloud

  An app may be able to enumerate a user's installed apps

  A permissions issue was addressed with additional restrictions.

  CVE-2026-28880 CVE-2026-28833

• libxpc

  An app may be able to enumerate a user's installed apps

  This issue was addressed with improved checks.

  CVE-2026-28882

• Mail

  "Hide IP Address" and "Block All Remote Content" may not apply to all mail content

  A privacy issue was addressed with improved handling of user preferences.

  CVE-2026-20692

• NetAuth

  An app may be able to connect to a network share without user consent

  An access issue was addressed with additional sandbox restrictions.

  CVE-2026-20701

• Notes

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

  A path handling issue was addressed with improved validation.

  CVE-2026-28816

• SMB

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

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

  CVE-2026-28825

• SystemMigration

  An attacker may gain access to protected parts of the file system

  A file access issue was addressed with improved input validation.

  CVE-2026-28844

• WebDAV

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

  A permissions issue was addressed with additional restrictions.

  CVE-2026-28829

• WebKit

  Processing maliciously crafted web content may prevent Content Security Policy from being enforced

  This issue was addressed through improved state management.

  CVE-2026-20665

• WebKit

  A malicious website may be able to access script message handlers intended for other origins

  A logic issue was addressed with improved state management.

  CVE-2026-28861

• WebKit Sandboxing

  A maliciously crafted webpage may be able to fingerprint the user

  An authorization issue was addressed with improved state management.

  CVE-2026-20691

macOS Tahoe Security Release History

macOS Tahoe 26.4 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