About the security content of macOS Tahoe 26.5 - Apple Support
About the security content of macOS Tahoe 26.5
This document describes the security content of macOS Tahoe 26.5.
About Apple security updates
For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security releases page.
Apple security documents reference vulnerabilities by CVE-ID when possible.
For more information about security, see the Apple Product Security page.
macOS Tahoe 26.5
Released May 11, 2026
Accelerate
Available for: macOS Tahoe
Impact: An app may be able to cause a denial-of-service
Description: An out-of-bounds read was addressed with improved bounds checking.
CVE-2026-28991: Seiji Sakurai (@HeapSmasher)
Accounts
Available for: macOS Tahoe
Impact: An app may be able to bypass certain Privacy preferences
Description: A permissions issue was addressed with additional restrictions.
CVE-2026-28988: Asaf Cohen
APFS
Available for: macOS Tahoe
Impact: An app may be able to cause unexpected system termination
Description: A buffer overflow was addressed with improved bounds checking.
CVE-2026-28959: Dave G.
App Intents
Available for: macOS Tahoe
Impact: A malicious app may be able to break out of its sandbox
Description: A logic issue was addressed with improved restrictions.
CVE-2026-28995: Vamshi Paili, Tony Gorez (@tonygo_) for Reverse Society
AppleJPEG
Available for: macOS Tahoe
Impact: Processing a maliciously crafted image may lead to a denial-of-service
Description: 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-2026-1837
AppleJPEG
Available for: macOS Tahoe
Impact: Processing a maliciously crafted media file may lead to unexpected app termination or corrupt process memory
Description: A memory corruption issue was addressed with improved input validation.
CVE-2026-28956: impost0r (ret2plt)
Audio
Available for: macOS Tahoe
Impact: Processing an audio stream in a maliciously crafted media file may terminate the process
Description: The issue was addressed with improved memory handling.
CVE-2026-39869: David Ige of Beryllium Security
CoreMedia
Available for: macOS Tahoe
Impact: An app may be able to access private information
Description: This issue was addressed through improved state management.
CVE-2026-28922: Arni Hardarson
CoreServices
Available for: macOS Tahoe
Impact: Processing a maliciously crafted file may lead to unexpected app termination
Description: The issue was addressed with improved checks.
CVE-2026-28936: Andreas Jaegersberger & Ro Achterberg of Nosebeard Labs
CoreSymbolication
Available for: macOS Tahoe
Impact: Parsing a maliciously crafted file may lead to an unexpected app termination
Description: An out-of-bounds access issue was addressed with improved bounds checking.
CVE-2026-28918: Niels Hofmans, Anonymous working with TrendAI Zero Day Initiative
CUPS
Available for: macOS Tahoe
Impact: An app may be able to gain root privileges
Description: A parsing issue in the handling of directory paths was addressed with improved path validation.
CVE-2026-28915: Andreas Jaegersberger & Ro Achterberg of Nosebeard Labs
FileProvider
Available for: macOS Tahoe
Impact: An app may be able to access sensitive user data
Description: A race condition was addressed with additional validation.
CVE-2026-43659: Alex Radocea
GPU Drivers
Available for: macOS Tahoe
Impact: A malicious app may be able to break out of its sandbox
Description: A logging issue was addressed with improved data redaction.
CVE-2026-28923: Kun Peeks (@SwayZGl1tZyyy)
HFS
Available for: macOS Tahoe
Impact: An app may be able to cause unexpected system termination or write kernel memory
Description: A buffer overflow was addressed with improved bounds checking.
CVE-2026-28925: Aswin Kumar Gokula Kannan, Dave G.
ImageIO
Available for: macOS Tahoe
Impact: Processing a maliciously crafted image may corrupt process memory
Description: A buffer overflow issue was addressed with improved memory handling.
CVE-2026-43661: an anonymous researcher
ImageIO
Available for: macOS Tahoe
Impact: Processing a maliciously crafted file may lead to unexpected app termination
Description: The issue was addressed with improved bounds checks.
CVE-2026-28977: Suresh Sundaram
ImageIO
Available for: macOS Tahoe
Impact: Processing a maliciously crafted image may corrupt process memory
Description: The issue was addressed with improved memory handling.
CVE-2026-28990: Jiri Ha, Arni Hardarson
Installer
Available for: macOS Tahoe
Impact: A malicious app may be able to break out of its sandbox
Description: A permissions issue was addressed with additional restrictions.
CVE-2026-28978: wdszzml and Atuin...