AppleがiPhoneなど向けiOS 26.5とiPadOS 26.5をリリース！
Appleは11日（現地時間）、同社が販売するスマートフォン（スマホ）「iPhone」シリーズ向けプラットフォーム「iOS」とタブレット「iPad」シリーズ向けプラットフォーム「iPadOS」の最新バージョン「iOS 26.5（23F77）」および「iPadOS 26.5（23F77）」を提供開始したとお知らせしています。変更点はエンドツーエンド（End-to-End：E2E）で暗号化されたRCSメッセージ（ベータ版）への対応とダウンロード可能なプライドルミナンスの壁紙が追加され、iPhoneおよびiPadでの機能向上やバグ修正、セキュリティーアップデートも含まれるということです。
なお、セキュリティーアップデートについてはCVEに登録されているKernel関連の「CVE-2026-43654」や「CVE-2026-28897」、「CVE-2026-28951」、「CVE-2026-28972」、「CVE-2026-28986」、「CVE-2026-28987」、WebKit関連の「CVE-2026-43660」や「CVE-2026-28907」、「CVE-2026-28962」、「CVE-2026-43658」、「CVE-2026-28905」、「CVE-2026-28904」、「CVE-2026-28903」などの61個の脆弱性が修正されているということで、同社ではこれらの脆弱性のうちのいくつかは積極的に悪用されている可能性があるという報告を認識しているとしています。
対象機種はiOS 26.5では最新の「iPhone 17e」を含めたiPhone 11シリーズ以降やiPhone SE（第2世代）以降が対象、iPadOS 26.5ではiPad（第8世代）以降やiPad mini（第5世代）以降、iPad Air（第3世代）以降、12.9インチiPad Pro（第3世代）以降および11インチiPad Pro（第1世代）以降のiPad Proシリーズが対象で、各製品にて無料で更新可能です。なお、iOS 18の対象機種だったiPhone XSシリーズおよびiPhone XR、iPadOS 18の対象機種だったiPad（第7世代）はそれぞれ対象外となり、対象外の機種ではそれぞれiOS 26やiPadOS 26にはアップデートできないのでご注意ください。
また同社では合わせてより古いiPhoneやiPadなど向けに「iOS 18.7.9」および「iPadOS 18.7.9」や「iPadOS 17.7.11」、「iOS 16.7.16」および「iPadOS 16.7.17」、「iOS 15.8.8」および「iPadOS 15.8.8」、パソコン「Mac」向け「macOS Tahoe 26.5」、スマートウォッチ「Apple Watch」向け「watchOS 26.5」、スマートテレビ「Apple TV」向け「tvOS 26.5」、スマートヘッドセット「Apple Vision」向け「visionOS 26.5」なども配信開始しています。
iPhone向けのiOSやiPad向けのiPadOSの最新メジャーバージョンとして先ごろよりiOS 26.0とiPadOS 26.0が提供開始されていましたが、これらに続けて新機能が追加されたiOS 26.1とiPadOS 26.1、iOS 26.2とiPadOS 26.2、iOS 26.3とiPadOS 26.3、iOS 26.4とiPadOS 26.4が提供され、その後、iOS 26.4とiPadOS 26.4の不具合や脆弱性を修正したiOS 26.4.1・iPadOS 26.4.1やiOS 26.4.2」と・iPadOS 26.4.2がリリースされてきましたが、今回、E2Eで暗号化したRCSメッセージに対応したほか、複数の不具合や脆弱性の修正が行われたiOS 26.5およびiPadOS 26.5がリリースされました。iOS 26.5およびiPadOS 26.5の対象機種は以下の通り。
＜iOS 26対応製品＞
・iPhone 17e
・iPhone 17
・iPhone 17 Pro
・iPhone 17 Pro Max
・iPhone Air
・iPhone 16e
・iPhone 16
・iPhone 16 Plus
・iPhone 16 Pro
・iPhone 16 Pro Max
・iPhone 15
・iPhone 15 Plus
・iPhone 15 Pro
・iPhone 15 Pro Max
・iPhone 14
・iPhone 14 Plus
・iPhone 14 Pro
・iPhone 14 Pro Max
・iPhone 13
・iPhone 13 mini
・iPhone 13 Pro
・iPhone 13 Pro Max
・iPhone 12
・iPhone 12 mini
・iPhone 12 Pro
・iPhone 12 Pro Max
・iPhone 11
・iPhone 11 Pro
・iPhone 11 Pro Max
・iPhone SE（第3世代）
・iPhone SE（第2世代）
＜iPadOS 26対応製品＞
・iPad（第8世代）
・iPad（第9世代）
・iPad（第10世代）
・iPad（A16）
・iPad mini（第5世代）
・iPad mini（第6世代）
・iPad mini（A17 Pro）
・iPad Air（第3世代）
・iPad Air（第4世代）
・iPad Air（第5世代）
・11インチiPad Air（M2）
・11インチiPad Air（M3）
・11インチiPad Air（M4）
・13インチiPad Air（M2）
・13インチiPad Air（M3）
・13インチiPad Air（M4）
・11インチiPad Pro（第1世代）
・11インチiPad Pro（第2世代）
・11インチiPad Pro（第3世代）
・11インチiPad Pro（第4世代）
・11インチiPad Pro（M4）
・11インチiPad Pro（M5）
・12.9インチiPad Pro（第3世代）
・12.9インチiPad Pro（第4世代）
・12.9インチiPad Pro（第5世代）
・12.9インチiPad Pro（第6世代）
・13インチiPad Pro（M4）
・13インチiPad Pro（M5）
更新は従来通り各製品本体のみでOTA（On-The-Air）によりダウンロードで行え、方法としては、「設定」→「一般」→「ソフトウェア・アップデート」から行え、単体でアップデートする場合のダウンロードサイズは手持ちのiPhone 15 Pro MaxでiOS 26.4.2からだと1.38GBとなっています。またiTunesをインストールしたWindowsおよびMacとUSB-Lightningケーブルで接続しても実施できます。なお、Appleが案内しているアップデートの内容およびセキュリティーコンテンツの修正は以下の通り。
iOS 26.5
このアップデートには、以下の機能強化が含まれます：
・対応している通事業者では”メッセージ”でエンドツーエンドの暗号化を使用したRCSメッセージ（ベータ版）が利用できるようになり、順次拡大される予定です。詳しい情報： https://support.apple.com/ja-jp/109526
・ダイナミックに光を屈折させてさまざまな色合いを生み出すプライドルミナンスの壁紙がダウンロード可能になりましたAppleソフトウェアアップデートのセキュリティコンテンツについては、以下をご覧ください： https://support.apple.com/ja-jp/100100
一部の機能は、地域やiPhoneのモデルによっては使用できない場合があります。詳しくは以下をご覧ください： https://apple.com/jp/ios/feature-availability/
今回のアップデートのように、ソフトウェアアップデートでは、新機能やさまざまな改善が追加される一方で、パフォーマンスやバッテリー駆動時間に影響する場合があります。詳しくは以下をご覧ください： https://support.apple.com/ja-jp/125039
iPadOS 26.5
このアップデートには、以下の機能強化が含まれます：
・対応している通事業者では”メッセージ”でエンドツーエンドの暗号化を使用したRCSメッセージ（ベータ版）が利用できるようになり、順次拡大される予定です。詳しい情報： https://support.apple.com/ja-jp/109526
・ダイナミックに光を屈折させてさまざまな色合いを生み出すプライドルミナンスの壁紙がダウンロード可能になりましたAppleソフトウェアアップデートのセキュリティコンテンツについては、以下をご覧ください： https://support.apple.com/ja-jp/100100
一部の機能は、地域やiPadのモデルによっては使用できない場合があります。詳しくは以下をご覧ください： https://apple.com/jp/ios/feature-availability/
今回のアップデートのように、ソフトウェアアップデートでは、新機能やさまざまな改善が追加される一方で、パフォーマンスやバッテリー駆動時間に影響する場合があります。詳しくは以下をご覧ください： https://support.apple.com/ja-jp/125039
iOS 26.5 and iPadOS 26.5
Released May 11, 2026– Accelerate
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: An out-of-bounds read was addressed with improved bounds checking.
CVE-2026-28991: Seiji Sakurai (@HeapSmasher)– 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 bypass certain Privacy preferences
Description: A permissions issue was addressed with additional restrictions.
CVE-2026-28988: Asaf Cohen– APFS
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
Description: A buffer overflow was addressed with improved bounds checking.
CVE-2026-28959: Dave G.– App Intents
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 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: 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 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: 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 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: 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: The issue was addressed with improved memory handling.
CVE-2026-39869: David Ige of Beryllium Security– CoreAnimation
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 inconsistent user interface issue was addressed with improved state management.
CVE-2026-28964: Alan Wang, Christopher W. Fletcher, Hovav Shacham, David Kohlbrenner, Riccardo Paccagnella– CoreServices
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: The issue was addressed with improved checks.
CVE-2026-28936: Andreas Jaegersberger & Ro Achterberg of Nosebeard Labs– CoreSymbolication
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: 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– FileProvider
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 race condition was addressed with additional validation.
CVE-2026-43659: Alex Radocea– 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 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: 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: The issue was addressed with improved bounds checks.
CVE-2026-28977: Suresh Sundaram– 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 image may corrupt process memory
Description: The issue was addressed with improved memory handling.
CVE-2026-28990: Jiri Ha, Arni Hardarson– IOHIDFamily
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 memory corruption vulnerability was addressed with improved locking.
CVE-2026-28992: Johnny Franks (@zeroxjf)– IOHIDFamily
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 determine kernel memory layout
Description: A logging issue was addressed with improved data redaction.
CVE-2026-28943: Google Threat Analysis Group– IOKit
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
Description: A use after free issue was addressed with improved memory management.
CVE-2026-28969: Mihalis Haatainen, Ari Hawking, Ashish Kunwar– IOSurfaceAccelerator
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 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: 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: The issue was addressed with improved memory handling.
CVE-2026-43654: Vaagn Vardanian, Nathaniel Oh (@calysteon)– 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: 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: 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 gain root privileges
Description: An authorization issue was addressed with improved state management.
CVE-2026-28951: Csaba Fitzl (@theevilbit) of Iru– 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: 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: 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
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: 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: A logging issue was addressed with improved data redaction.
CVE-2026-28987: Dhiyanesh Selvaraj (@redroot97)– LaunchServices
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 type confusion issue was addressed with improved checks.
CVE-2026-28983: Ruslan Dautov– mDNSResponder
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 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: 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 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: 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 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: 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 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: 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 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– Networking
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 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: 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: 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– SceneKit
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 unexpected app termination
Description: A buffer overflow was addressed with improved bounds checking.
CVE-2026-28846: Peter Malone– Screenshots
Available for: iPhone 15 and later
Impact: An attacker with physical access may be able to use Visual Intelligence to access sensitive user data during iPhone Mirroring
Description: A privacy issue was addressed by removing the vulnerable code.
CVE-2026-28963: Jorge Welch– Shortcuts
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 user-sensitive data
Description: This issue was addressed by adding an additional prompt for user consent.
CVE-2026-28993: Doron Assness– Spotlight
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: This issue was addressed with improved checks to prevent unauthorized actions.
CVE-2026-28974: Andy Koo (@andykoo) of Hexens– Status Bar
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 capture a user’s screen
Description: An issue with app access to camera metadata was addressed with improved logic.
CVE-2026-28957: Adriatik Raci– Storage
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 race condition was addressed with additional validation.
CVE-2026-28996: Alex Radocea– 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: A validation issue was addressed with improved logic.
WebKit Bugzilla: 308906
CVE-2026-43660: Cantina– 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: The issue was addressed with improved input validation.
WebKit Bugzilla: 308675
CVE-2026-28907: Cantina– 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 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: 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 Safari crash
Description: The issue was addressed with improved memory handling.
WebKit Bugzilla: 307669
CVE-2026-43658: Do Young Park– 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: 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: 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.
WebKit Bugzilla: 313939
CVE-2026-28883: kwak kiyong / kakaogames– 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: 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: 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 input validation.
WebKit Bugzilla: 310527
CVE-2026-28917: Vitaly Simonovich– 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 Safari crash
Description: A use-after-free issue was addressed with improved memory management.
WebKit Bugzilla: 310234
CVE-2026-28947: dr3dd
WebKit Bugzilla: 312180
CVE-2026-28942: Milad Nasr and Nicholas Carlini with Claude, Anthropic– 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 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: 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: 311131
CVE-2026-28944: Kenneth Hsu of Palo Alto Networks, Jérôme DJOUDER, dr3dd– Wi-Fi
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 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– WidgetKit
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 may be able to view restricted content from the lock screen
Description: A privacy issue was addressed with improved checks.
CVE-2026-28965: Abhay Kailasia (@abhay_kailasia) from Safran Mumbai India– zlib
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 leak sensitive data
Description: An information leakage was addressed with additional validation.
CVE-2026-28920: Brendon Tiszka of Google Project Zero
■関連リンク
・エスマックス（S-MAX）
・エスマックス（S-MAX） smaxjp on Twitter
・S-MAX – Facebookページ
・iOS 26 関連記事一覧 – S-MAX
・iPadOS 26 関連記事一覧 – S-MAX
・End-to-end encrypted RCS messaging begins rolling out today in beta – Apple
・iOS 26 のアップデートについて – Apple サポート (日本)
・iPadOS 26 のアップデートについて – Apple サポート (日本)
・iOS 26.5およびiPadOS 26.5のセキュリティコンテンツについて – Apple サポート (日本)
・Apple セキュリティアップデート – Apple サポート
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