macOS Sequoia 15.8.3 Security Update

What macOS Sequoia 15.8.3 Fixes

macOS Sequoia 15.8.3, released November 9, 2026, fixes 8 vulnerabilities in 6 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 15.8.3 a routine security update: worth installing soon, not an emergency.

It is the newest security release for macOS Sequoia on Apple's list.

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

Which Devices Get macOS Sequoia 15.8.3

Apple lists macOS Sequoia 15.8.3 for: macOS Sequoia.

How to Install macOS Sequoia 15.8.3

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 15.8.3 there is nothing to do.

Every Fix in macOS Sequoia 15.8.3

All 8 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.

• AirPlay

  An attacker in Bluetooth range may be able to bypass the rate limit on pairing code attempts

  A logic issue was addressed with improved state management.

  CVE-2026-113968

• CoreUtils

  An attacker in Bluetooth range may be able to bypass the rate limit on pairing code attempts and pair with a device without user interaction

  A logic issue was addressed with improved state management.

  CVE-2026-113964

• rapportd

  An attacker on the same network may be able to bypass the rate limit on AirPlay pairing code attempts

  A logic issue was addressed with improved state management.

  CVE-2026-113969

• Bluetooth

  An attacker in Bluetooth range may be able to corrupt process memory

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

  CVE-2026-113970

• brotli

  Processing maliciously crafted input may lead to memory corruption

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

  CVE-2026-111497

• CoreUtils

  A malicious Bluetooth device may be able to establish a pairing without user interaction

  This issue was addressed with improved checks.

  CVE-2026-113965

• Messages

  A user added to an iMessage group may be able to access messages sent before they joined

  This issue was addressed by removing the vulnerable code.

  CVE-2026-113960

• Messages

  A remote attacker may be able to join an iMessage group chat and receive its messages

  An authorization issue was addressed with improved validation.

  CVE-2026-113961

macOS Sequoia Security Release History

macOS Sequoia 15.8.3 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