APPLE-SA-05-11-2026-6 macOS Tahoe 26.5

[Apple Product Security via Fulldisclosure <fulldisclosure () seclists org>]

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APPLE-SA-05-11-2026-6 macOS Tahoe 26.5

macOS Tahoe 26.5 addresses the following issues.
Information about the security content is also available at
https://support.apple.com/en-us/127115.

Apple maintains a Security Releases page at
https://support.apple.com/100100 which lists recent
software updates with security advisories.

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 Automated Vulnerability Discovery
Engine

IOHIDFamily
Available for: macOS Tahoe
Impact: An attacker may be able to cause unexpected app termination
Description: A memory corruption vulnerability was addressed with
improved locking.
CVE-2026-28992: Johnny Franks (@zeroxjf)

IOHIDFamily
Available for: macOS Tahoe
Impact: An app may be able to determine kernel memory layout
Description: A logging issue was addressed with improved data redaction.
CVE-2026-28943: Google Threat Analysis Group

IOKit
Available for: macOS Tahoe
Impact: An app may be able to cause unexpected system termination
Description: A use after free issue was addressed with improved memory
management.
CVE-2026-28969: Mihalis Haatainen, Ari Hawking, Ashish Kunwar

IOSurfaceAccelerator
Available for: macOS Tahoe
Impact: An app may be able to cause unexpected system termination or
read kernel memory
Description: An out-of-bounds read was addressed with improved bounds
checking.
CVE-2026-43655: Somair Ansar and an anonymous researcher

Kernel
Available for: macOS Tahoe
Impact: An app may be able to disclose kernel memory
Description: The issue was addressed with improved memory handling.
CVE-2026-43654: Vaagn Vardanian, Nathaniel Oh (@calysteon)

Kernel
Available for: macOS Tahoe
Impact: An app may be able to modify protected parts of the file system
Description: A denial of service issue was addressed by removing the
vulnerable code.
CVE-2026-28908: beist

Kernel
Available for: macOS Tahoe
Impact: A maliciously crafted disk image may bypass Gatekeeper checks
Description: A file quarantine bypass was addressed with additional
checks.
CVE-2026-28954: Yiğit Can YILMAZ (@yilmazcanyigit)

Kernel
Available for: macOS Tahoe
Impact: A local user may be able to cause unexpected system termination
or read kernel memory
Description: A buffer overflow was addressed with improved input
validation.
CVE-2026-28897: popku1337, Billy Jheng Bing Jhong and Pan Zhenpeng
(@Peterpan0927) of STAR Labs SG Pte. Ltd., Robert Tran, Aswin kumar
Gokulakannan

Kernel
Available for: macOS Tahoe
Impact: An app may be able to cause unexpected system termination
Description: An integer overflow was addressed with improved input
validation.
CVE-2026-28952: Calif.io in collaboration with Claude and Anthropic
Research

Kernel
Available for: macOS Tahoe
Impact: An app may be able to gain root privileges
Description: An authorization issue was addressed with improved state
management.
CVE-2026-28951: Csaba Fitzl (@theevilbit) of Iru

Kernel
Available for: macOS Tahoe
Impact: An app may be able to cause unexpected system termination or
write kernel memory
Description: An out-of-bounds write issue was addressed with improved
input validation.
CVE-2026-28972: Billy Jheng Bing Jhong and Pan Zhenpeng (@Peterpan0927)
of STAR Labs SG Pte. Ltd., Ryan Hileman via Xint Code (xint.io)

Kernel
Available for: macOS Tahoe
Impact: An app may be able to cause unexpected system termination
Description: A race condition was addressed with additional validation.
CVE-2026-28986: Chris Betz, Tristan Madani (@TristanInSec) from Talence
Security, Ryan Hileman via Xint Code (xint.io)

Kernel
Available for: macOS Tahoe
Impact: An app may be able to leak sensitive kernel state
Description: A logging issue was addressed with improved data redaction.
CVE-2026-28987: Dhiyanesh Selvaraj (@redroot97)

LaunchServices
Available for: macOS Tahoe
Impact: A remote attacker may be able to cause a denial of service
Description: A type confusion issue was addressed with improved checks.
CVE-2026-28983: Ruslan Dautov

Mail Drafts
Available for: macOS Tahoe
Impact: Replying to an email could display remote images in Mail in
Lockdown Mode
Description: A logic issue was addressed with improved checks.
CVE-2026-28929: Yiğit Can YILMAZ (@yilmazcanyigit)

mDNSResponder
Available for: macOS Tahoe
Impact: An attacker on the local network may be able to cause a
denial-of-service
Description: The issue was addressed with improved memory handling.
CVE-2026-43653: Atul R V

mDNSResponder
Available for: macOS Tahoe
Impact: An attacker on the local network may be able to cause a
denial-of-service
Description: A null pointer dereference was addressed with improved
input validation.
CVE-2026-28985: Omar Cerrito

mDNSResponder
Available for: macOS Tahoe
Impact: A remote attacker may be able to cause unexpected system
termination or corrupt kernel memory
Description: A use after free issue was addressed with improved memory
management.
CVE-2026-43668: Anton Pakhunov, Ricardo Prado

mDNSResponder
Available for: macOS Tahoe
Impact: An attacker on the local network may be able to cause a
denial-of-service
Description: An out-of-bounds write issue was addressed with improved
bounds checking.
CVE-2026-43666: Ian van der Wurff (ian.nl)

Model I/O
Available for: macOS Tahoe
Impact: Processing a maliciously crafted file may lead to a
denial-of-service or potentially disclose memory contents
Description: The issue was addressed with improved checks.
CVE-2026-28941: Michael DePlante (@izobashi) of TrendAI Zero Day
Initiative

Model I/O
Available for: macOS Tahoe
Impact: Processing a maliciously crafted image may corrupt process
memory
Description: The issue was addressed with improved memory handling.
CVE-2026-28940: Michael DePlante (@izobashi) of TrendAI Zero Day
Initiative

Network Extensions
Available for: macOS Tahoe
Impact: An attacker with physical access to a locked device may be able
to view sensitive user information
Description: This issue was addressed with improved checks.
CVE-2026-28961: Dan Raviv

Networking
Available for: macOS Tahoe
Impact: An attacker may be able to track users through their IP address
Description: This issue was addressed through improved state management.
CVE-2026-28906: Ilya Sc. Jowell A.

Quick Look
Available for: macOS Tahoe
Impact: Parsing a maliciously crafted file may lead to an unexpected app
termination
Description: An out-of-bounds write issue was addressed with improved
input validation.
CVE-2026-43656: Peter Malone

Sandbox
Available for: macOS Tahoe
Impact: An app may be able to access protected user data
Description: A permissions issue was addressed with additional
restrictions.
CVE-2026-43652: Asaf Cohen

SceneKit
Available for: macOS Tahoe
Impact: Processing a maliciously crafted image may corrupt process
memory
Description: The issue was addressed with improved memory handling.
CVE-2026-39870: Peter Malone

SceneKit
Available for: macOS Tahoe
Impact: A remote attacker may be able to cause unexpected app
termination
Description: A buffer overflow was addressed with improved bounds
checking.
CVE-2026-28846: Peter Malone

Shortcuts
Available for: macOS Tahoe
Impact: An app may be able to access user-sensitive data
Description: This issue was addressed by adding an additional prompt for
user consent.
CVE-2026-28993: Doron Assness

SMB
Available for: macOS Tahoe
Impact: A remote attacker may be able to cause unexpected system
termination
Description: A buffer overflow was addressed with improved bounds
checking.
CVE-2026-28848: Peter Malone, Dave G. and Alex Radocea of Supernetworks

Spotlight
Available for: macOS Tahoe
Impact: An app may be able to access protected user data
Description: A permissions issue was addressed with additional
restrictions.
CVE-2026-28930: Pan ZhenPeng (@Peterpan0927) of STAR Labs SG Pte. Ltd.

Spotlight
Available for: macOS Tahoe
Impact: An app may be able to cause a denial-of-service
Description: This issue was addressed with improved checks to prevent
unauthorized actions.
CVE-2026-28974: Andy Koo (@andykoo) of Hexens

Storage
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-2026-28996: Alex Radocea

StorageKit
Available for: macOS Tahoe
Impact: An app may be able to gain root privileges
Description: A consistency issue was addressed with improved state
handling.
CVE-2026-28919: Amy (amys.website)

Sync Services
Available for: macOS Tahoe
Impact: An app may be able to access Contacts without user consent
Description: A race condition was addressed with improved handling of
symbolic links.
CVE-2026-28924: Andreas Jaegersberger & Ro Achterberg of Nosebeard Labs,
YingQi Shi (@Mas0nShi) of DBAppSecurity's WeBin lab

TV App
Available for: macOS Tahoe
Impact: An app may be able to observe unprotected user data
Description: A path handling issue was addressed with improved logic.
CVE-2026-39871: an anonymous researcher

UserAccountUpdater
Available for: macOS Tahoe
Impact: An app may be able to gain root privileges
Description: An information leakage was addressed with additional
validation.
CVE-2026-28976: David Ige - Beryllium Security

WebKit
Available for: macOS Tahoe
Impact: Processing maliciously crafted web content may prevent Content
Security Policy from being enforced
Description: A validation issue was addressed with improved logic.
WebKit Bugzilla: 308906
CVE-2026-43660: Cantina

WebKit
Available for: macOS Tahoe
Impact: Processing maliciously crafted web content may prevent Content
Security Policy from being enforced
Description: The issue was addressed with improved input validation.
WebKit Bugzilla: 308675
CVE-2026-28907: Cantina

WebKit
Available for: macOS Tahoe
Impact: Processing maliciously crafted web content may disclose
sensitive user information
Description: This issue was addressed with improved access restrictions.
WebKit Bugzilla: 309698
CVE-2026-28962: Luke Francis, Vaagn Vardanian, kwak kiyong / kakaogames,
Vitaly Simonovich, Adel Bouachraoui, greenbynox

WebKit
Available for: macOS Tahoe
Impact: Processing maliciously crafted web content may lead to an
unexpected Safari crash
Description: The issue was addressed with improved memory handling.
WebKit Bugzilla: 307669
CVE-2026-43658: Do Young Park

WebKit
Available for: macOS Tahoe
Impact: Processing maliciously crafted web content may lead to an
unexpected process crash
Description: The issue was addressed with improved memory handling.
WebKit Bugzilla: 308545
CVE-2026-28905: Yuhao Hu, Yuanming Lai, Chenggang Wu, and Zhe Wang
WebKit Bugzilla: 308707
CVE-2026-28847: DARKNAVY (@DarkNavyOrg), Anonymous working with TrendAI
Zero Day Initiative, Daniel Rhea
WebKit Bugzilla: 309601
CVE-2026-28904: Luka Rački
WebKit Bugzilla: 310880
CVE-2026-28955: wac and Kookhwan Lee working with TrendAI Zero Day
Initiative
WebKit Bugzilla: 310303
CVE-2026-28903: Mateusz Krzywicki (iVerify.io)
WebKit Bugzilla: 309628
CVE-2026-28953: Maher Azzouzi
WebKit Bugzilla: 309861
CVE-2026-28902: Tristan Madani (@TristanInSec) from Talence Security,
Nathaniel Oh (@calysteon)
WebKit Bugzilla: 310207
CVE-2026-28901: Aisle offensive security research team (Joshua Rogers,
Luigino Camastra, Igor Morgenstern, and Guido Vranken), Maher Azzouzi,
Ngan Nguyen of Calif.io
WebKit Bugzilla: 311631
CVE-2026-28913: an anonymous researcher

WebKit
Available for: macOS Tahoe
Impact: Processing maliciously crafted web content may lead to an
unexpected process crash
Description: A use-after-free issue was addressed with improved memory
management.
WebKit Bugzilla: 313939
CVE-2026-28883: kwak kiyong / kakaogames

WebKit
Available for: macOS Tahoe
Impact: An app may be able to access sensitive user data
Description: This issue was addressed with improved data protection.
WebKit Bugzilla: 311228
CVE-2026-28958: Cantina

WebKit
Available for: macOS Tahoe
Impact: Processing maliciously crafted web content may lead to an
unexpected process crash
Description: The issue was addressed with improved input validation.
WebKit Bugzilla: 310527
CVE-2026-28917: Vitaly Simonovich

WebKit
Available for: macOS Tahoe
Impact: Processing maliciously crafted web content may lead to an
unexpected Safari crash
Description: A use-after-free issue was addressed with improved memory
management.
WebKit Bugzilla: 310234
CVE-2026-28947: dr3dd
WebKit Bugzilla: 310544
CVE-2026-28946: Gia Bui (@yabeow) from Calif.io, dr3dd, w0wbox
WebKit Bugzilla: 312180
CVE-2026-28942: Milad Nasr and Nicholas Carlini with Claude, Anthropic

WebKit
Available for: macOS Tahoe
Impact: A malicious iframe may use another website’s download settings
Description: The issue was addressed with improved UI handling.
WebKit Bugzilla: 311288
CVE-2026-28971: Khiem Tran

WebRTC
Available for: macOS Tahoe
Impact: Processing maliciously crafted web content may lead to an
unexpected process crash
Description: The issue was addressed with improved memory handling.
WebKit Bugzilla: 311131
CVE-2026-28944: Kenneth Hsu of Palo Alto Networks, Jérôme DJOUDER, dr3dd

Wi-Fi
Available for: macOS Tahoe
Impact: An app may be able to execute arbitrary code with kernel
privileges
Description: An out-of-bounds write issue was addressed with improved
bounds checking.
CVE-2026-28819: Wang Yu

Wi-Fi
Available for: macOS Tahoe
Impact: An attacker in a privileged network position may be able to
perform denial-of-service attack using crafted Wi-Fi packets
Description: A use after free issue was addressed with improved memory
management.
CVE-2026-28994: Alex Radocea

zip
Available for: macOS Tahoe
Impact: A maliciously crafted ZIP archive may bypass Gatekeeper checks
Description: A logic issue was addressed with improved file handling.
CVE-2026-28914: Andreas Jaegersberger & Ro Achterberg of Nosebeard Labs
(nosebeard.co)

zlib
Available for: macOS Tahoe
Impact: Visiting a maliciously crafted website may leak sensitive data
Description: An information leakage was addressed with additional
validation.
CVE-2026-28920: Brendon Tiszka of Google Project Zero

Additional recognition

App Intents
We would like to acknowledge Mikael Kinnman for their assistance.

App Store
We would like to acknowledge Asaf Cohen, Johan Wahyudi for their
assistance.

Apple Account
We would like to acknowledge Iván Savransky, Kun Peeks (@SwayZGl1tZyyy),
YingQi Shi (@Mas0nShi) of DBAppSecurity's WeBin lab for their
assistance.

Audio
We would like to acknowledge Brian Carpenter for their assistance.

bzip2
We would like to acknowledge Andreas Jaegersberger & Ro Achterberg of
Nosebeard Labs for their assistance.

CoreAnimation
We would like to acknowledge Jordan Pittman for their assistance.

CoreUI
We would like to acknowledge Mustafa Calap ​ for their assistance.

ICU
We would like to acknowledge an anonymous researcher for their
assistance.

Kernel
We would like to acknowledge Ryan Hileman via Xint Code (xint.io), an
anonymous researcher for their assistance.

libarchive
We would like to acknowledge Andreas Jaegersberger & Ro Achterberg of
Nosebeard Labs for their assistance.

libnetcore
We would like to acknowledge Chris Staite and David Hardy of Menlo
Security Inc for their assistance.

Libnotify
We would like to acknowledge Ilias Morad (@A2nkF_) for their assistance.

Location
We would like to acknowledge Kun Peeks (@SwayZGl1tZyyy) for their
assistance.

mDNSResponder
We would like to acknowledge Jason Grove for their assistance.

Messages
We would like to acknowledge Jeffery Kimbrow for their assistance.

Notes
We would like to acknowledge Asilbek Salimov for their assistance.

OpenSSH
We would like to acknowledge Anand Patil for their assistance.

Photos
We would like to acknowledge Christopher Mathews for their assistance.

ppp
We would like to acknowledge Cem Onat Karagun, Surya Kushwaha for their
assistance.

Safari
We would like to acknowledge sean mutuku for their assistance.

Safari Push Notifications
We would like to acknowledge Robert Mindo for their assistance.

Siri
We would like to acknowledge Yoav Magid for their assistance.

Time Machine
We would like to acknowledge Andreas Jaegersberger & Ro Achterberg of
Nosebeard Labs for their assistance.

WebKit
We would like to acknowledge Muhammad Zaid Ghifari (Mr.ZheeV),
Kalimantan Utara, Qadhafy Muhammad Tera, Vitaly Simonovich for their
assistance.

WebRTC
We would like to acknowledge Hyeonji Son (@jir4vv1t) of Demon Team for
their assistance.

Wi-Fi
We would like to acknowledge Kun Peeks (@SwayZGl1tZyyy) for their
assistance.

macOS Tahoe 26.5 may be obtained from the Mac App Store or Apple's
Software Downloads web site: https://support.apple.com/downloads/

All information is also posted on the Apple Security Releases
web site: https://support.apple.com/100100.

This message is signed with Apple's Product Security PGP key,
and details are available at:
https://www.apple.com/support/security/pgp/

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