About the security content of iOS 26.4 and iPadOS 26.4
This document describes the security content of iOS 26.4 and iPadOS 26.4.
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.
iOS 26.4 and iPadOS 26.4
Released March 24, 2026
802.1X
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An attacker in a privileged network position may be able to intercept network traffic
Description: An authentication issue was addressed with improved state management.
CVE-2026-28865: Héloïse Gollier and Mathy Vanhoef (KU Leuven)
Accounts
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to access sensitive user data
Description: An authorization issue was addressed with improved state management.
CVE-2026-28877: Rosyna Keller of Totally Not Malicious Software
App Protection
Available for: iPhone 11 and later
Impact: An attacker with physical access to an iOS device with Stolen Device Protection enabled may be able to access biometrics-gated Protected Apps with the passcode
Description: The issue was addressed with improved checks.
CVE-2026-28895: Zack Tickman
Audio
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
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.
CVE-2026-28879: Justin Cohen of Google
Audio
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An attacker may be able to cause unexpected app termination
Description: A type confusion issue was addressed with improved memory handling.
CVE-2026-28822: Jex Amro
Baseband
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: A remote attacker may cause an unexpected app termination
Description: The issue was addressed with improved checks.
CVE-2026-28874: Hazem Issa, Tuan D. Hoang, and Yongdae Kim @ SysSec, KAIST
Baseband
Available for: iPhone 16e
Impact: A remote attacker may be able to cause a denial-of-service
Description: A buffer overflow was addressed with improved bounds checking.
CVE-2026-28875: Tuan D. Hoang and Yongdae Kim @ KAIST SysSec Lab
Calling Framework
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: A remote attacker may be able to cause a denial-of-service
Description: A denial-of-service issue was addressed with improved input validation.
CVE-2026-28894: an anonymous researcher
Clipboard
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to access sensitive user data
Description: This issue was addressed with improved validation of symlinks.
CVE-2026-28866: Cristian Dinca (icmd.tech)
CoreMedia
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: Processing an audio stream in a maliciously crafted media file may terminate the process
Description: An out-of-bounds access issue was addressed with improved bounds checking.
CVE-2026-20690: Hossein Lotfi (@hosselot) of Trend Micro Zero Day Initiative
CoreUtils
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: A user in a privileged network position may be able to cause a denial-of-service
Description: A null pointer dereference was addressed with improved input validation.
CVE-2026-28886: Etienne Charron (Renault) and Victoria Martini (Renault)
Crash Reporter
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to enumerate a user's installed apps
Description: A privacy issue was addressed by removing sensitive data.
CVE-2026-28878: Zhongcheng Li from IES Red Team
curl
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An issue existed in curl which may result in unintentionally sending sensitive information via an incorrect connection
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-2025-14524
DeviceLink
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to access sensitive user data
Description: A parsing issue in the handling of directory paths was addressed with improved path validation.
CVE-2026-28876: Andreas Jaegersberger & Ro Achterberg of Nosebeard Labs
GeoServices
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to access sensitive user data
Description: An information leakage was addressed with additional validation.
CVE-2026-28870: XiguaSec
iCloud
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to enumerate a user's installed apps
Description: A permissions issue was addressed with additional restrictions.
CVE-2026-28880: Zhongcheng Li from IES Red Team
CVE-2026-28833: Zhongcheng Li from IES Red Team
ImageIO
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: Processing a maliciously crafted file may lead to unexpected app termination
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-2025-64505
Kernel
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to disclose kernel memory
Description: A logging issue was addressed with improved data redaction.
CVE-2026-28868: 이동하 (Lee Dong Ha of BoB 0xB6)
Kernel
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to leak sensitive kernel state
Description: This issue was addressed with improved authentication.
CVE-2026-28867: Jian Lee (@speedyfriend433)
Kernel
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to cause unexpected system termination or corrupt kernel memory
Description: The issue was addressed with improved memory handling.
CVE-2026-20698: DARKNAVY (@DarkNavyOrg)
Kernel
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to cause unexpected system termination or write kernel memory
Description: A use after free issue was addressed with improved memory management.
CVE-2026-20687: Johnny Franks (@zeroxjf)
libxpc
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to enumerate a user's installed apps
Description: This issue was addressed with improved checks.
CVE-2026-28882: Ilias Morad (A2nkF) of Voynich Group, Duy Trần (@khanhduytran0), @hugeBlack
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: "Hide IP Address" and "Block All Remote Content" may not apply to all mail content
Description: A privacy issue was addressed with improved handling of user preferences.
CVE-2026-20692: Andreas Jaegersberger & Ro Achterberg of Nosebeard Labs
Printing
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to break out of its sandbox
Description: A path handling issue was addressed with improved validation.
CVE-2026-20688: wdszzml and Atuin Automated Vulnerability Discovery Engine
Sandbox Profiles
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to fingerprint the user
Description: A permissions issue was addressed with additional restrictions.
CVE-2026-28863: Gongyu Ma (@Mezone0)
Security
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: A local attacker may gain access to user's Keychain items
Description: This issue was addressed with improved permissions checking.
CVE-2026-28864: Alex Radocea
Siri
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An attacker with physical access to a locked device may be able to view sensitive user information
Description: The issue was addressed with improved authentication.
CVE-2026-28856: an anonymous researcher
Telephony
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: A remote user may be able to cause unexpected system termination or corrupt kernel memory
Description: A buffer overflow was addressed with improved bounds checking.
CVE-2026-28858: Hazem Issa and Yongdae Kim @ SysSec, KAIST
UIFoundation
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: An app may be able to cause a denial-of-service
Description: A stack overflow was addressed with improved input validation.
CVE-2026-28852: Caspian Tarafdar
WebKit
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: Processing maliciously crafted web content may prevent Content Security Policy from being enforced
Description: This issue was addressed through improved state management.
WebKit Bugzilla: 304951
CVE-2026-20665: webb
WebKit
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: Processing maliciously crafted web content may bypass Same Origin Policy
Description: A cross-origin issue in the Navigation API was addressed with improved input validation.
WebKit Bugzilla: 306050
CVE-2026-20643: Thomas Espach
WebKit
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: Visiting a maliciously crafted website may lead to a cross-site scripting attack
Description: A logic issue was addressed with improved checks.
WebKit Bugzilla: 305859
CVE-2026-28871: @hamayanhamayan
WebKit
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
WebKit Bugzilla: 306136
CVE-2026-20664: Daniel Rhea, Söhnke Benedikt Fischedick (Tripton), Emrovsky & Switch, Yevhen Pervushyn
WebKit Bugzilla: 307723
CVE-2026-28857: Narcis Oliveras Fontàs, Söhnke Benedikt Fischedick (Tripton), Daniel Rhea, Nathaniel Oh (@calysteon)
WebKit
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: A malicious website may be able to access script message handlers intended for other origins
Description: A logic issue was addressed with improved state management.
WebKit Bugzilla: 307014
CVE-2026-28861: Hongze Wu and Shuaike Dong from Ant Group Infrastructure Security Team
WebKit
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: A malicious website may be able to process restricted web content outside the sandbox
Description: The issue was addressed with improved memory handling.
WebKit Bugzilla: 308248
CVE-2026-28859: greenbynox, Arni Hardarson
WebKit Sandboxing
Available for: iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later
Impact: A maliciously crafted webpage may be able to fingerprint the user
Description: An authorization issue was addressed with improved state management.
WebKit Bugzilla: 306827
CVE-2026-20691: Gongyu Ma (@Mezone0)
Additional recognition
Accessibility
We would like to acknowledge Abhay Kailasia (@abhay_kailasia) from Safran Mumbai India, Jacob Prezant (prezant.us) for their assistance.
AirPort
We would like to acknowledge Yashar Shahinzadeh, Saman Ebrahimnezhad, Amir Safari, Omid Rezaii for their assistance.
App Protection
We would like to acknowledge Andr.Ess for their assistance.
Bluetooth
We would like to acknowledge Hamid Mahmoud for their assistance.
Captive Network
We would like to acknowledge Kun Peeks (@SwayZGl1tZyyy) for their assistance.
CipherML
We would like to acknowledge Nils Hanff (@nils1729@chaos.social) of Hasso Plattner Institute for their assistance.
CloudAttestation
We would like to acknowledge Suresh Sundaram, Willard Jansen for their assistance.
CoreUI
We would like to acknowledge Peter Malone for their assistance.
Find My
We would like to acknowledge Salemdomain for their assistance.
GPU Drivers
We would like to acknowledge Jian Lee (@speedyfriend433) for their assistance.
ICU
We would like to acknowledge Jian Lee (@speedyfriend433) for their assistance.
Kernel
We would like to acknowledge DARKNAVY (@DarkNavyOrg), Kylian Boulard De Pouqueville From Fuzzinglabs, Patrick Ventuzelo From Fuzzinglabs, Robert Tran, Suresh Sundaram for their assistance.
libarchive
We would like to acknowledge Andreas Jaegersberger & Ro Achterberg of Nosebeard Labs, Arni Hardarson for their assistance.
libc
We would like to acknowledge Vitaly Simonovich for their assistance.
Libnotify
We would like to acknowledge Ilias Morad (@A2nkF_) for their assistance.
LLVM
We would like to acknowledge Nathaniel Oh (@calysteon) for their assistance.
mDNSResponder
We would like to acknowledge William Mather for their assistance.
Messages
We would like to acknowledge JZ for their assistance.
MobileInstallation
We would like to acknowledge Gongyu Ma (@Mezone0) for their assistance.
Music
We would like to acknowledge Mohammad Kaif (@_mkahmad | kaif0x01) for their assistance.
NetworkExtension
We would like to acknowledge Jianfeng Chen from yq12260 of Intretech for their assistance.
Notes
We would like to acknowledge Dawuge of Shuffle Team and Hunan University for their assistance.
Notifications
We would like to acknowledge Abhay Kailasia (@abhay_kailasia) of Lakshmi Narain College of Technology Bhopal India for their assistance.
ppp
We would like to acknowledge Dave G. for their assistance.
Quick Look
We would like to acknowledge Wojciech Regula of SecuRing (wojciechregula.blog), an anonymous researcher for their assistance.
Safari
We would like to acknowledge @RenwaX23, Bikesh Parajuli, Farras Givari, Syarif Muhammad Sajjad, Yair for their assistance.
Safari Private Browsing
We would like to acknowledge Jaime Gallego Matud for their assistance.
Shortcuts
We would like to acknowledge Waleed Barakat (@WilDN00B) and Paul Montgomery (@nullevent) for their assistance.
Siri
We would like to acknowledge Anand Mallaya, Tech consultant, Anand Mallaya and Co., Harsh Kirdolia, Hrishikesh Parmar of Self-Employed for their assistance.
Spotlight
We would like to acknowledge Bilge Kaan Mızrak, Claude & Friends: Risk Analytics Research Group, Zack Tickman for their assistance.
Status Bar
We would like to acknowledge Sahel Alemi for their assistance.
Telephony
We would like to acknowledge Xue Zhang, Yi Chen for their assistance.
Time Zone
We would like to acknowledge Abhay Kailasia (@abhay_kailasia) from Safran Mumbai India for their assistance.
UIKit
We would like to acknowledge AEC, Abhay Kailasia (@abhay_kailasia) from Safran Mumbai India, Ben Gallagher, Bishal Kafle (@whoisbishal.k), Carlos Luna (U.S. Department of the Navy), Dalibor Milanovic, Daren Goodchild, JS De Mattei, Maxwell Garn, Zack Tickman, fuyuu12, incredincomp for their assistance.
Wallet
We would like to acknowledge Zhongcheng Li from IES Red Team of ByteDance for their assistance.
Web Extensions
We would like to acknowledge Carlos Jeurissen, Rob Wu (robwu.nl) for their assistance.
WebKit
We would like to acknowledge Vamshi Paili, greenbynox, and an anonymous researcher for their assistance.
WebKit Process Model
We would like to acknowledge Joseph Semaan for their assistance.
Wi-Fi
We would like to acknowledge Kun Peeks (@SwayZGl1tZyyy), an anonymous researcher for their assistance.
Wi-Fi Connectivity
We would like to acknowledge Alex Radocea of Supernetworks, Inc for their assistance.
Widgets
We would like to acknowledge Marcel Voß, Mitul Pranjay, Serok Çelik for their assistance.
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