CVE-2026-28991: High severity Apple iPadOS vulnerability

Published May 11, 2026
·
Updated

Accelerate. An out-of-bounds read was addressed with improved bounds checking.

Other sources

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.8.2, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An app may be able to cause a denial-of-service.

— MITRE

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An app may be able to cause a denial-of-service.

— NVD

Credit

Seiji Sakurai@@HeapSmasher, an anonymous researcher, Bhaswanth Chigurupati, Dave G., We Muftihaturrahmah, Aswin Kumar Gokula Kannan, Ruslan Dautov, Peter Malone, Thomas Guillem, Narendra Singh@@_3P1C, Kwak Kiyong@@Pwnkai23, Song Nuri, Thanatos Tian (HKPolyU) & wgg with Diffract, Claudio Bozzato(Cisco Talos), Francesco Benvenuto(Cisco Talos), Johan Wahyudi, tamdao, Jaeyeong Lee, Meta Red Team X - Nik Tsytsarkin, Hcamael, 章鱼哥 (aipyaipy.com)@@aipy, Dohyeon An Technology Inc@@PILAB, Rahul Raj, Josh Maine(Calif), Chanwit Muenprakoddee (ChemIndy), YingMuo@@YingMuo(DEVCORE Research Team), Paul Montgomery@@nullevent, lunar815, Nathaniel Oh@@calysteon, Piotr Jerzy Duszynski, Surej Sekhar, r3pwnx@@r3pwnx, Lily Cohl@@GenericCoding, Lakshay Sharma (MrW0r57), Abodi Dawoud, Marco Schmitt(Calif), Andrey Chernykh(Calif), Franco Belman at Blackwing Intelligence, Murray Mike(Nosebeard Labs), Andreas Jaegersberger & Ro Achterberg(Nosebeard Labs), 준우 이, Pasquale Scola, Neon, Niels Hofmans, Mustafa Calap@@ordinal0, dbg.re), zenith, Mateusz Jurczyk(Google Project Zero), Tucker Willenborg, Frederick Kaludis (Coiffeur0x90)(Nosebeard Labs), DEVADATH V L, Junyeong Lee (jylab.github.io), Weeraphat Srisutham, Yejun Kim, Zwei Tasse Kaffee, Jihwan Yoon, an anonymous researcher(Calif), 章鱼哥 (aipyaipy.com)@@aipy(Calif), Roman Zabicki(Calif), Anna Groza@@pwnlambda(Calif), Altin Gashi, Përparim Mjeku, f4&Zhiniang Peng with HUST(Calif), Aobo Wang@@M4x_1997(Calif), Xiang Chen(Calif), Jakob Pammer(Calif), 정우 하@@0xfa11babe, Chris Bailey - Short Circuit, Nurihan Kim (HanTul)(TrendAI Zero Day Initiative), Jurre van Bergen - Threatnotify, Mathis Mansière, 章鱼哥 (aipyaipy.com）@@aipy, Redon Gashi (Sentry), Sanny Mitra, Alfredo Pesoli@@__rev(Bynar), Koh M. Nakagawa@@tsunek0h(FFRI Security Inc), Csaba Fitzl@@theevilbit(Iru), Lyutoon, Andrey Chernykh (BypassLabs.ai), Keisuke Hosoda, oxsignal, Rodolphe BRUNETTI@@eisw0lf(Lupus Nova), R4mbb, Asaf Cohen, f00l@@PPPF00L, 3ndy1@@_3ndy1, Anand (anandsreekumar.com), He Wei (ギカク), powerprove(Protectiv IT Security Inc), Michael Benich(Protectiv IT Security Inc), Niels Hofmans(Protectiv IT Security Inc), Christian Niel Angel(Protectiv IT Security Inc), Lyutoon(SecuRing), Seung Je Seong(SecuRing), R4mbb(SecuRing), Wojciech Regula(SecuRing), Aswin Kumar Gokulakannan, Minseok Kim, Thanatos Tian (HKPolyU) & wgg & xmr, Marco Schmitt, Yash Pandya, Parth Raval, Sattyam Yadav(Protectiv IT Security Inc), onetwo(Protectiv IT Security Inc), Robert Tran, Merrick Hare, Eddy Tsalolikhin, Johann Rehberger, Wout van der Ploeg (woutvanderploeg.nl), sh3rlock (김보겸), Andrey Chernykh, Sihyun Roh (Compsec, SNU), Charles Stevenson, Seung Je Seong, Bhuwan Bhetwal(Braze Security Team), Kwak Kiyong@@Pwnkai23(Braze Security Team), Song Nuri(Braze Security Team), Nicolas Seriot(Braze Security Team), Tommy DeVoss@@thedawgyg(Braze Security Team), Navapon Premkasem, Richard Zana, Pedro Pinho, Frederick Kaludis (Coiffeur0x90)(DBAppSecurity's WeBin lab), YingQi Shi@@Mas0nShi(DBAppSecurity's WeBin lab), Lakshay Sharma (MrW0r57)/WorstCase Labs.(Iru), Ashish Kavishwar(Iru), Gergely Kalman@@gergely_kalman, Wang Yu, Cem Onat Karagun, John Lussier, greenbynox, OpenAI(STAR Labs SG Pte), Billy Jheng Bing Jhong(STAR Labs SG Pte), Pan Zhenpeng@@Peterpan0927(STAR Labs SG Pte), Marc Newlin(SkySafe), Xinru Chi(Pangu Lab), Nebula Security@@nebusecurity(Aginor), Tim Michaud@@TimGMichaud(Aginor), f0r(MurphySec), Arnold Cartagena(Tolmo), Matt Suiche@@msuiche(Tolmo), Jakob Pammer, Jerry L. Knot, Eliya M., Viacheslav Radiukov, Tristan Madani (Talence Security), Daniel Rodríguez, Abodi Dawoud(Lupus Nova), Ilya Andr (andrd3v)(Positive Technologies), Zhongquan Li@@Guluisacat, Mustafa Ahmed, Musaab Khan@@bxff, Saoud Khalifah, stratan@@5tratan, ret2happy@@ret2happy, 진규정 (Gyujeong Jin(DEVCORE Research Team), @@G1uN4sh(DEVCORE Research Team), Lucas Parnell(DEVCORE Research Team), Nathaniel Oh@@calysteon(DEVCORE Research Team), Meta Red Team X - Nik Tsytsarkin(DEVCORE Research Team), Nik Tsytsarkin, Md Rasel Bhuyan (www.linkedin.com/in/rasel-bhuyan), Jonathan Bar Or@@yo_yo_yo_jbo, Mickey Jin@@patch1t, Varik Matevosyan@@D4RK7ET, Prafull Dhiman, Alto_00000, Siddharth Aeri, Gabriel '0xv1n' Cardona, Mrunal Chawda, Kujtim Kryeziu (Sentry), 도현 김, Ithrael, YEONGJAE SHIN, Hongsik Kim (mnur), Efstratios Kaplanellis@@5tratan(Almamater Technologies), ruitong@@abstract, an anonymous researcher(Nosebeard Labs), Niels Hofmans(Nosebeard Labs), 도현 김(Nosebeard Labs), Junyeong Lee (jylab.github.io)(Nosebeard Labs), Jonghoon Han (Aegis), Ahmad Al Harrizuan Izadin(Iru), Prathamesh Walunj(Iru), f4&Zhiniang Peng with HUST, Geonha Lee@@leegn4a, Substrate, Arni Hardarson (Neonix Security), Yujung Choi@@Dusker, Stefan Esser (Calif), Alfredo Pesoli via Bynario Atlas (bynar.io)@@__rev, Anon Tuttu Venus, Mahmoud Abdelmoniem, koocolb, Stav Nir, Vladimir Tokarev, Arni Hardarson (Neonix Security)(Iru), Pranav Gopalkrishnan, Alan Wang, Ailsa Sun, Hovav Shacham, Riccardo Paccagnella, Chris Fletcher, David Kohlbrenner, Richard Hyunho Im at Route Zero Security@@richeeta(Almamater Technologies), Alex Radocea, cnitlrt@@abstract(Sentry), Roman Belovitskiy(Sentry), Lyutoon(Sentry), Art Pllana(Sentry), Redon Gashi(Sentry), lokerxx, Teodor Sorescu@@teodorsorescu, Phillip Groves, cnitlrt@@abstract, Aditya Kumar, Lucas Lammer, Stuart Wallace, 진규정 (Gyujeong Jin, @@G1uN4sh, Albin Haliti, Sindre Sorhus, Morris Richman@@morrisinlife, Bhuwan Bhetwal(ThreatBook), Feng Xue(ThreatBook), XGPT(ThreatBook), Nathaniel Oh@@calysteon(Talence Security), Narendra Singh@@_3P1C(Talence Security), Tristan Madani@@TristanInSec(Talence Security), D4rthL, Santiago Albertengo, Pan ZhenPeng@@Peterpan0927(STAR Labs SG Pte), Gergely Kalman@@gergely_kalman(Nosebeard Labs), Lyutoon(Nosebeard Labs), Jaeyeong Lee(Nosebeard Labs), Maher Azzouzi, Frederick Kaludis (Coiffeur0x90), Mufeed VH(Winfunc Research), 云开 江, Joshua Maina, Mahmoud Gamal@@Zombiehelp54, Thanatos Tian (HKPolyU) & wgg & 2st with Diffract(Aginor), Peter Malone(Aginor), David Krehwinkel, Rotce(SkySafe), Sandeep Wawdane (thecybersandeep)(SkySafe), Ankur Saini(Volexity), Song nuri, Ricardo Prado, Arash Ale Ebrahim(SCy), Vamshi Paili, Tony Gorez for Reverse Society@@tonygo_, CVE-2026-1837, impost0r (ret2plt), Nicholas Soh, David Ige(Beryllium Security), Niels Hofmans(TrendAI Zero Day Initiative), Anonymous(TrendAI Zero Day Initiative), Gandalf4a(PKU), Anton Pakhunov, Suresh Sundaram, Jiri Ha, Arni Hardarson, Johnny Franks@@0xjohnny, Google Threat Analysis Group, Mihalis Haatainen, Ari Hawking, Ashish Kunwar, Dhiyanesh Selvaraj@@redroot97, Somair Ansar, Vaagn Vardanian, popku1337(STAR Labs SG Pte), Aswin kumar Gokulakannan, Ryan Hileman via Xint Code (xint.io), Chris Betz(Talence Security), Ian van der Wurff (ian.nl), Andy Koo@@andykoo(Hexens), Cantina, Do Young Park, Artem Dinaburg(Trail of Bits via Anthropic CVD), kwak kiyong / kakaogames, Idan Masas(TrendAI Zero Day Initiative), DARKNAVY@@DarkNavyOrg(TrendAI Zero Day Initiative), Daniel Rhea, Luka Rački, wac(TrendAI Zero Day Initiative), Kookhwan Lee(TrendAI Zero Day Initiative), Mateusz Krzywicki (iVerify.io), Aisle offensive security research team (Joshua Rogers(Calif), Luigino Camastra(Calif), Igor Morgenstern(Calif), (Calif), Guido Vranken)(Calif), Maher Azzouzi(Calif), Ngan Nguyen(Calif), Vitaly Simonovich, dr3dd, Milad Nasr, Nicholas Carlini with Claude, Anthropic, Brendon Tiszka(Google Project Zero), Christopher W. Fletcher, Zhongcheng Li (CK01), Atul R V, Omar Cerrito, Michael DePlante@@izobashi(TrendAI Zero Day Initiative), Ilya Sc. Jowell A., Jorge Welch, Doron Assness, Adriatik Raci, Luke Francis, Adel Bouachraoui, Yuhao Hu, Yuanming Lai, Chenggang Wu, Zhe Wang, Khiem Tran, lebr0nli(National Yang Ming Chiao Tung University), Security, Systems Lab, Kenneth Hsu(Palo Alto Networks), Jérôme DJOUDER, Abhay Kailasia@@abhay_kailasia(Safran Mumbai India), CVE-2025-14017, CVE-2025-14819, Kun Peeks@@SwayZGl1tZyyy, wdszzml, Atuin Automated Vulnerability Discovery Engine, beist, Yiğit Can YILMAZ@@yilmazcanyigit, Calif.io in collaboration with Claude, Anthropic Research, Prathamesh Walunj@@attahasa, Dan Raviv, Surya Kushwaha(Supernetworks), Robert Tran(Supernetworks), Peter Malone(Supernetworks), Dave G.(Supernetworks), Alex Radocea(Supernetworks), Amy (amys.website), David Ige - Beryllium Security, Gia Bui@@yabeow(Calif), w0wbox

Affected Software

13 affected componentsFixes available
Apple iPadOS<26.5
Apple iPhone OS<26.5
Apple macOS>=26.0<26.5
Apple tvOS<26.5
Apple visionOS<26.5
Apple WatchOS<26.5
Apple iOS<26.5
26.5
Apple iPadOS<26.5
26.5
Apple macOS Tahoe<26.5
26.5
Apple tvOS<26.5
26.5
Apple WatchOS<26.5
26.5
Apple visionOS<26.5
26.5
Apple macOS Sequoia<15.8.2
15.8.2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 26.5
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 15.8.2
  3. Upgrade

    Upgrade Accelerate on iOS and iPadOS to a version that resolves this vulnerability.

    Fixed in 26.5
  4. Upgrade

    Upgrade Accelerate on macOS Sequoia to a version that resolves this vulnerability.

    Fixed in 15.8.2
  5. Upgrade

    Upgrade Accelerate on macOS Tahoe to a version that resolves this vulnerability.

    Fixed in 26.5
  6. Upgrade

    Upgrade Accelerate on tvOS to a version that resolves this vulnerability.

    Fixed in 26.5
  7. Upgrade

    Upgrade Accelerate on visionOS to a version that resolves this vulnerability.

    Fixed in 26.5
  8. Upgrade

    Upgrade Accelerate on watchOS to a version that resolves this vulnerability.

    Fixed in 26.5

Event History

May 11, 2026
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
CVE Published
via MITRE·08:08 PM
Data Sourced
via MITRE·08:08 PM
DescriptionWeakness
Data Sourced
via NVD·09:18 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2026-28991?

CVE-2026-28991 is classified as a moderate severity vulnerability.

2

How do I fix CVE-2026-28991?

To fix CVE-2026-28991, update your device to iOS 26.5, iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, or watchOS 26.5.

3

What type of vulnerability is CVE-2026-28991?

CVE-2026-28991 is an out-of-bounds read vulnerability that can result in data exposure.

4

Which Apple products are affected by CVE-2026-28991?

CVE-2026-28991 affects various Apple products including iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS versions prior to 26.5.

5

What can happen if I do not address CVE-2026-28991?

If CVE-2026-28991 is not addressed, it may lead to potential denial-of-service conditions on the affected devices.

Company

Resources

Contact

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