macOS Sequoia 15.8 Security Update

What macOS Sequoia 15.8 Fixes

macOS Sequoia 15.8, released September 14, 2026, fixes 180 vulnerabilities in 86 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 Sequoia 15.8 a routine security update: worth installing soon, not an emergency.

It has since been superseded: the newest security release for macOS Sequoia is macOS Sequoia 15.8.2, from October 26, 2026, which includes these fixes.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 Sequoia 15.8

Apple lists macOS Sequoia 15.8 for: macOS Sequoia.

How to Install macOS Sequoia 15.8

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 Sequoia 15.8 there is nothing to do.

Every Fix in macOS Sequoia 15.8

All 180 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.

• autofs

  An attacker with control of a network directory server may be able to execute arbitrary code with root privileges

  A path traversal issue was addressed with improved path validation.

  CVE-2026-84568

• AVEVideoEncoder

  A sandboxed app may be able to execute arbitrary code with kernel privileges

  A race condition was addressed with improved state management.

  CVE-2026-84607

• Bluetooth

  A remote attacker may be able to cause unexpected app termination or arbitrary code execution

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

  CVE-2026-65414

• Core Bluetooth

  An attacker with a paired Bluetooth device may be able to execute arbitrary code

  A stack overflow was addressed with improved input validation.

  CVE-2026-86919

• CUPS

  A remote user may cause an unexpected app termination or arbitrary code execution

  A validation issue was addressed with improved input sanitization.

  CVE-2026-43692

• ImageIO

  Processing an image may lead to arbitrary code execution

  An integer overflow was addressed with improved input validation.

  CVE-2026-65346

• ImageIO

  Processing a maliciously crafted image may lead to arbitrary code execution

  An integer overflow was addressed with improved input validation.

  CVE-2026-64759

• Kernel

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

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

  CVE-2026-86916

• WebDAV

  Connecting to a malicious WebDAV server may result in code execution

  A memory corruption issue was addressed with improved validation.

  CVE-2026-65374

• AMD

  An app may be able to elevate privileges

  The issue was addressed with improved checks.

  CVE-2026-28853

• APFS

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

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

  CVE-2026-84523

• AppleMobileFileIntegrity

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

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

  CVE-2026-65381

• 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

• Automator

  An app may be able to break out of its sandbox

  An authorization issue was addressed with improved state management.

  CVE-2026-84535

• configd

  An app with admin privileges may be able to modify the System Keychain

  An authorization issue was addressed with improved entitlement checks.

  CVE-2026-86907

• CoreMedia

  A sandboxed process may be able to circumvent sandbox restrictions

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

  CVE-2026-86876

• CoreML

  A sandboxed app may be able to access restricted files

  A permissions issue was addressed with improved path validation.

  CVE-2026-84624

• CoreServices

  An app may be able to gain root privileges

  This issue was addressed with additional entitlement checks.

  CVE-2026-43786

• CUPS

  An attacker in a privileged network position may be able to cause a denial-of-service

  An integer overflow was addressed with improved input validation.

  CVE-2026-84554

• CUPS

  An app may be able to gain elevated privileges

  A path handling issue was addressed with improved validation.

  CVE-2026-64790

• CUPS

  An app may be able to gain root privileges

  A path handling issue was addressed with improved validation.

  CVE-2026-43691

• Directory Utility

  An app may be able to gain root privileges

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

  CVE-2026-84505

• Disk Images

  An app may be able to gain root privileges

  This issue was addressed with improved checks.

  CVE-2026-65362

• Disk Images

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

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-84512

• Heimdal

  A user in a privileged network position may be able to leak sensitive user information

  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-2022-3437

• HFS

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

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-84581

• IOMobileFrameBuffer

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

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

  CVE-2026-64736

• Kernel

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

  The issue was addressed with improved memory handling.

  CVE-2026-84566

• Kernel

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

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

  CVE-2026-28968

• Kernel

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

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

  CVE-2026-84619

• Kernel

  Connecting to a malicious NFS server may cause unexpected system termination or corrupt kernel memory

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

  CVE-2026-84549

• Kernel

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

  The issue was addressed with improved memory handling.

  CVE-2026-43790

• Kernel

  An app with root privileges may be able to read uninitialized kernel memory

  A memory initialization issue was addressed with improved memory handling.

  CVE-2026-84622

• Kernel

  Connecting to a malicious NFS server may cause unexpected system termination or corrupt kernel memory

  An integer overflow was addressed with improved input validation.

  CVE-2026-84544

• Kernel

  An app may be able to gain root privileges

  A permissions issue was addressed with additional restrictions.

  CVE-2026-86917

• 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-2026-43684

• Kernel

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

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

  CVE-2026-43686

• Kernel

  An app may be able to determine kernel memory layout

  A memory initialization issue was addressed with improved memory handling.

  CVE-2026-65405

• Kernel

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

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

  CVE-2026-65349

• Kernel

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

  The issue was addressed with improved memory handling.

  CVE-2026-65330 CVE-2026-28935 CVE-2026-84599

• 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-2026-84507

• Kernel

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

  A double free issue was addressed with improved memory management.

  CVE-2026-84561

• Kernel

  A local user may be able to cause unexpected system termination or read kernel memory

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

  CVE-2026-65359

• Kernel

  An app may be able to disclose kernel memory

  This issue was addressed with improved redaction of sensitive information.

  CVE-2026-65371

• Mail

  An attacker in a privileged network position may be able to leak sensitive user information

  A logic issue was addressed with improved checks.

  CVE-2026-43787

• odproxyd

  An app may be able to gain root privileges

  This issue was addressed with improved checks.

  CVE-2026-64712

• quarantine

  An app may be able to break out of its sandbox

  The issue was addressed with improved checks.

  CVE-2026-84580

• quarantine

  An app may be able to break out of its sandbox

  A logic issue was addressed with improved checks.

  CVE-2026-84578

• Security

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

  A certificate validation issue was addressed with improved certificate validation.

  CVE-2026-86889

• SMB

  A local user may be able to read kernel memory

  A race condition was addressed with improved locking.

  CVE-2026-43690

• SMB

  Connecting to a malicious SMB server may cause unexpected system termination or corrupt kernel memory

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

  CVE-2026-84543

• SMB

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

  The issue was addressed with improved memory handling.

  CVE-2026-84537

• SMB

  Connecting to a malicious SMB share may disclose kernel memory

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

  CVE-2026-65365

• SMB

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

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

  CVE-2026-84515

• udf

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

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

  CVE-2026-84572

• udf

  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-2026-84506

• Accessibility

  An app may be able to access sensitive user data

  This issue was addressed with improved data protection.

  CVE-2026-43664

• Accounts

  An app may be able to access sensitive user data

  This issue was addressed with additional entitlement checks.

  CVE-2026-112446

• AppKit

  An app may be able to access protected user data

  A permissions issue was addressed with additional restrictions.

  CVE-2026-84587

• Apple Account

  An app may be able to use the Sign In With Apple authentication flow to access the user's Apple Account

  An authentication issue was addressed with improved state management.

  CVE-2026-20683

• ATS

  An app may be able to access user-sensitive data

  A logging issue was addressed with improved data redaction.

  CVE-2026-84525

• ATS

  An app may be able to access sensitive user data

  A permissions issue was addressed with improved validation.

  CVE-2026-65342

• Audio

  An app may be able to leak sensitive user information

  A logic issue was addressed with improved checks.

  CVE-2026-65339

• autofs

  An app may be able to bypass Gatekeeper checks

  A logic issue was addressed with improved checks.

  CVE-2026-84570

• BackgroundAssets

  An app may be able to access sensitive user data

  A logic issue was addressed with improved validation.

  CVE-2026-65406

• copyfile

  An archive may be able to bypass Gatekeeper

  A file quarantine bypass was addressed with additional checks.

  CVE-2026-65399

• CoreMedia

  An app may be able to access user-sensitive data

  An access issue was addressed with additional sandbox restrictions.

  CVE-2026-43789

• CoreMotion

  An app may be able to access motion data from headphones without user consent

  An authorization issue was addressed with improved validation.

  CVE-2026-43737

• CoreServices

  An app may be able to bypass Privacy preferences

  A permissions issue was addressed with improved state management.

  CVE-2026-84574

• CUPS

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-84540

• Game Center

  An app may be able to access sensitive user data

  A permissions issue was addressed with improved validation.

  CVE-2026-84618

• Image Capture

  An app may be able to access user-sensitive data

  A path handling issue was addressed with improved validation.

  CVE-2026-64756

• Kernel

  A malicious application may bypass Gatekeeper checks

  A logic issue was addressed with improved state management.

  CVE-2026-65369

• Kernel

  A remote attacker may be able to bypass firewall rules

  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-2019-5598

• Keychain Access

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved access control.

  CVE-2026-84556

• LaunchServices

  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-2026-65382

• Mail

  An app may be able to access sensitive user data

  This issue was addressed with improved checks.

  CVE-2026-84573

• mDNSResponder

  An app may be able to access sensitive network connection information

  An information disclosure issue was addressed with improved state management.

  CVE-2026-86914

• Messages

  An app may be able to access protected user data

  A logic issue was addressed with improved state management.

  CVE-2026-43741

• Multi-Touch

  A malicious application may be able to bypass Privacy preferences

  A race condition was addressed with additional validation.

  CVE-2026-65372

• NetworkExtension

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-43695

• QuartzCore

  An app may be able to access sensitive user data

  This issue was addressed with improved checks.

  CVE-2026-84576

• Reminders

  An app may be able to access sensitive user data

  This issue was addressed with improved checks.

  CVE-2026-65403

• Sandbox

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved access control.

  CVE-2026-84555

• Shortcuts

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management

  CVE-2026-28850

• Siri

  An app may be able to access sensitive user data

  An access issue was addressed with improved access controls.

  CVE-2026-65356

• SoftwareUpdate

  An app may be able to access sensitive user data

  This issue was addressed with improved checks.

  CVE-2026-65361

• Spotlight

  An app may be able to access protected user data

  A permissions issue was addressed with additional restrictions.

  CVE-2026-28930

• Spotlight

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-65378

• Spotlight

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved access control.

  CVE-2026-84621

• Storage

  An app may be able to access user-sensitive data

  A permissions issue was addressed with additional restrictions.

  CVE-2026-65345

• StorageKit

  An app may be able to read arbitrary files

  A validation issue was addressed with improved input sanitization.

  CVE-2026-43791

• Symptom Framework

  A malicious application may be able to determine a user's current location

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

  CVE-2026-84513

• TCC

  An app may be able to access sensitive user data

  A logging issue was addressed with improved data redaction.

  CVE-2026-84527

• WebDAV

  An app may bypass Gatekeeper checks

  A logic issue was addressed with improved checks.

  CVE-2026-28899

• WindowServer

  An app may be able to access sensitive user data

  The issue was addressed with improved handling of secure input state.

  CVE-2026-65379

• XPC

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-84617

• Accelerate Framework

  Processing a maliciously crafted image may lead to unexpected process termination

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

  CVE-2026-86882

• APFS

  An app may be able to cause unexpected system termination

  A buffer overflow was addressed with improved size validation.

  CVE-2026-65396

• Apple Neural Engine

  An app may be able to cause unexpected system termination

  An integer overflow was addressed with improved input validation.

  CVE-2026-65408

• 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

• AppleDouble

  Mounting a disk image with maliciously crafted files may lead to unexpected system termination

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

  CVE-2026-84519

• AVEVideoEncoder

  An app may be able to cause unexpected system termination

  A type confusion issue was addressed with improved memory handling.

  CVE-2026-84616

• Bluetooth

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

  A memory corruption issue was addressed with improved input validation.

  CVE-2026-84547

• Bluetooth

  An attacker in radio range may be able to cause unexpected system termination

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

  CVE-2026-84613

• cd9660

  An app may be able to cause unexpected system termination

  The issue was addressed with improved memory handling.

  CVE-2026-84567

• CoreDrag

  An app may be able to cause unexpected process termination or disclose process memory

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

  CVE-2026-43683

• CoreMedia

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

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

  CVE-2026-65344

• CoreMedia

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

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

  CVE-2026-86913

• 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

• CoreText

  Processing web content may lead to a denial-of-service

  A null pointer dereference was addressed with improved input validation.

  CVE-2026-65412

• CoreUI

  Processing a maliciously crafted file may lead to unexpected app termination

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

  CVE-2026-84575

• CoreUI

  Processing a maliciously crafted asset catalog may lead to unexpected process termination

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

  CVE-2026-84511

• CUPS

  An app may be able to cause unexpected system termination

  A logic issue was addressed with improved checks.

  CVE-2026-84563

• CUPS

  Processing a maliciously crafted file may result in unexpected app termination or disclosure of process memory

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

  CVE-2026-84516

• Disk Images

  Processing a maliciously crafted disk image may lead to unexpected app termination

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

  CVE-2026-84565

• Disk Images

  An app may be able to cause unexpected system termination

  The issue was addressed with improved memory handling.

  CVE-2026-84552

• Disk Images

  An app may be able to cause unexpected system termination

  A race condition was addressed with additional validation.

  CVE-2026-84550

• exFAT

  Mounting a maliciously crafted volume may lead to unexpected system termination

  A heap buffer overflow was addressed with improved bounds checking.

  CVE-2026-84510

• FontParser

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

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

  CVE-2026-84524

• Foundation

  An app may be able to cause a denial of service

  A type confusion issue was addressed with improved memory handling.

  CVE-2026-65409

• GPU Drivers

  An app may be able to cause unexpected system termination

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

  CVE-2026-86981

• Graphics

  An app may be able to cause unexpected system termination

  A race condition was addressed with improved state handling.

  CVE-2026-84492

• HFS

  Mounting a malicious disk image may cause unexpected system termination

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-28934

• 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 image may result in memory corruption

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

  CVE-2026-65395

• ImageIO

  Processing a maliciously crafted image may lead to heap corruption

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-84627

• IOAcceleratorFamily

  An app may be able to cause unexpected system termination

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

  CVE-2026-86944

• IOKit

  An app may be able to cause unexpected system termination

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

  CVE-2026-28969

• Kernel

  An app may be able to cause unexpected system termination

  A memory corruption issue was addressed with improved memory handling.

  CVE-2026-65377

• Kernel

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

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

  CVE-2026-84538

• Kernel

  A remote attacker may be able to cause unexpected system termination

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

  CVE-2026-65364

• Kernel

  An app may be able to cause unexpected system termination

  A race condition was addressed with improved state handling.

  CVE-2026-84630 CVE-2026-65360 CVE-2026-65358

• Kernel

  An app may be able to cause unexpected system termination

  A type confusion issue was addressed with improved checks.

  CVE-2026-84602

• Kernel

  An app may be able to cause unexpected system termination

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

  CVE-2026-65402 CVE-2026-84521

• Kernel

  An app may be able to cause unexpected system termination

  An integer overflow was addressed with improved input validation.

  CVE-2026-84517

• Kernel

  An app may be able to cause unexpected system termination

  A double free issue was addressed with improved memory management.

  CVE-2026-86962

• Messages

  Processing a maliciously crafted image may lead to unexpected process termination

  An input validation issue was addressed with improved input validation.

  CVE-2026-86959

• Model I/O

  Opening a maliciously crafted file may lead to unexpected process termination

  A buffer overflow was addressed with improved size validation.

  CVE-2026-84497

• RealityKit

  Opening a maliciously crafted file may cause unexpected process termination or disclose process memory

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

  CVE-2026-84532

• RealityKit

  Processing a maliciously crafted file may lead to unexpected app termination

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

  CVE-2026-28966

• SceneKit

  Processing a maliciously crafted 3D model may lead to memory corruption

  The issue was addressed with improved memory handling.

  CVE-2026-84632

• SceneKit

  An app may be able to cause a denial of service

  An integer overflow was addressed with improved input validation.

  CVE-2026-65413

• SceneKit

  Processing a maliciously crafted 3D model may lead to memory corruption

  An integer overflow was addressed with improved input validation.

  CVE-2026-84620

• SceneKit

  Processing a maliciously crafted 3D model may lead to memory corruption

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

  CVE-2026-84546 CVE-2026-84611

• SceneKit

  Processing a maliciously crafted 3D scene may lead to unexpected process termination

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

  CVE-2026-84526

• 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-2026-43719

• SMB

  An app may be able to cause unexpected system termination

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

  CVE-2026-65376

• SMB

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

  An integer underflow was addressed with improved input validation.

  CVE-2026-84536

• SMB

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

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

  CVE-2026-84509

• SMB

  An attacker with control of a network file server may be able to cause unexpected system termination

  An integer underflow was addressed with improved input validation.

  CVE-2026-86871

• smbx

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

  A resource exhaustion issue was addressed with improved input validation.

  CVE-2026-84553

• WebDAV

  Connecting to a malicious WebDAV server may lead to unexpected app termination

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

  CVE-2026-43677

• WebDAV

  An app may be able to cause unexpected system termination

  The issue was addressed with improved authentication.

  CVE-2026-65375

• Wi-Fi

  An attacker in wireless proximity may be able to cause unexpected system termination

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

  CVE-2026-86957

• APFS

  An application may be able to access restricted files

  A permissions issue was addressed with improved path validation.

  CVE-2026-86910

• AuthKit

  A local app may be able to read a persistent account identifier

  A permissions issue was addressed with additional restrictions.

  CVE-2026-84583

• Core Bluetooth

  An app may be able to access Bluetooth device information

  An authorization issue was addressed with improved state management.

  CVE-2026-86891

• CoreServices

  A malicious application may be able to access restricted files

  A permissions issue was addressed with improved validation.

  CVE-2026-84559

• CUPS

  An application may be able to access restricted files

  An input validation issue was addressed with improved input validation.

  CVE-2026-84541

• DesktopServices

  Opening a file referencing a network share may lead to unexpected software execution

  A logic issue was addressed with improved checks.

  CVE-2026-84579

• DeviceCheck

  An app may be able to read persistent device identifiers

  An authorization issue was addressed with improved access control.

  CVE-2026-84612

• File Bookmark

  An app may be able to modify a file it only had permission to read

  A permissions issue was addressed with additional restrictions.

  CVE-2026-43785

• file_cmds

  Extracting a maliciously crafted archive may allow an attacker to write arbitrary files

  A path handling issue was addressed with improved validation.

  CVE-2026-84534

• Heimdal

  An attacker may be able to impersonate other users

  An authentication issue was addressed with improved state management.

  CVE-2026-86868

• ImageIO

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

  An uninitialized memory issue was addressed with improved memory initialization.

  CVE-2026-84564

• Kext Management

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

  This issue was addressed with additional entitlement checks.

  CVE-2026-84514

• NetworkExtension

  An app may be able to identify what other apps a user has installed

  An information disclosure issue was addressed with improved state management.

  CVE-2026-84626

• Quick Look

  Processing a maliciously crafted document may lead to an out-of-bounds read

  An integer overflow was addressed with improved input validation.

  CVE-2026-84548

• SceneKit

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

  An integer overflow was addressed with improved input validation.

  CVE-2026-84487

• SceneKit

  Processing a maliciously crafted 3D file may lead to an out-of-bounds read

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

  CVE-2026-43697

• Security

  An attacker with a compromised intermediate certificate authority may be able to issue certificates with arbitrary extended key usages

  A certificate validation issue was addressed with improved certificate validation.

  CVE-2026-86881

• Software Update

  An app may be able to modify protected system files

  A permissions issue was addressed with improved path validation.

  CVE-2026-84609

• Storage

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

  A permissions issue was addressed with additional restrictions.

  CVE-2026-65348

macOS Sequoia Security Release History

macOS Sequoia 15.8 in context: the security releases Apple has published for macOS Sequoia, 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