CVE-2026-43661: Buffer Overflow

Published May 11, 2026
·
Updated

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5 and iPadOS 26.5, iOS 26.7 and iPadOS 26.7, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5, tvOS 26.5, watchOS 26.5. Processing a maliciously crafted image may corrupt process memory.

Other sources

Accelerate Framework. An out-of-bounds write issue was addressed with improved bounds checking.

— Apple

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

— Apple

Accessibility. This issue was addressed through improved state management.

— Apple

Accessibility. This issue was addressed with improved data protection.

— Apple

Accounts. A parsing issue in the handling of directory paths was addressed with improved path validation.

— Apple

Credit

Arash Ale Ebrahim(SCy), Dave G., Vamshi Paili, Tony Gorez for Reverse Society@@tonygo_, CVE-2026-1837, impost0r (ret2plt), Nicholas Soh, David Ige(Beryllium Security), Alan Wang, Ailsa Sun, Christopher W. Fletcher, Hovav Shacham, David Kohlbrenner, Riccardo Paccagnella, Andreas Jaegersberger & Ro Achterberg(Nosebeard Labs), Niels Hofmans(TrendAI Zero Day Initiative), Anonymous(TrendAI Zero Day Initiative), Alex Radocea, Gandalf4a(PKU), Anton Pakhunov, an anonymous researcher, Suresh Sundaram, Jiri Ha, Arni Hardarson, Johnny Franks@@0xjohnny, Google Threat Analysis Group, Mihalis Haatainen, Ari Hawking, Ashish Kunwar, Richard Zana, Dhiyanesh Selvaraj@@redroot97, Somair Ansar, Vaagn Vardanian, Nathaniel Oh@@calysteon, popku1337(STAR Labs SG Pte), Billy Jheng Bing Jhong(STAR Labs SG Pte), Pan Zhenpeng@@Peterpan0927(STAR Labs SG Pte), Robert Tran, Aswin kumar Gokulakannan, Csaba Fitzl@@theevilbit(Iru), Ryan Hileman via Xint Code (xint.io), Chris Betz(Talence Security), Tristan Madani@@TristanInSec(Talence Security), Ruslan Dautov, Zhongcheng Li (CK01), Atul R V, Omar Cerrito, Ricardo Prado, Ian van der Wurff (ian.nl), Michael DePlante@@izobashi(TrendAI Zero Day Initiative), Asaf Cohen, Ilya Sc. Jowell A., Peter Malone, Jorge Welch, Doron Assness, Andy Koo@@andykoo(Hexens), Adriatik Raci, Cantina, Luke Francis, kwak kiyong / kakaogames, Vitaly Simonovich, Adel Bouachraoui, greenbynox, Do Young Park, Artem Dinaburg(Trail of Bits via Anthropic CVD), Yuhao Hu, Yuanming Lai, Chenggang Wu, Zhe Wang, 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), Maher Azzouzi, Aisle offensive security research team (Joshua Rogers(Calif), Luigino Camastra(Calif), Igor Morgenstern(Calif), (Calif), Guido Vranken)(Calif), Maher Azzouzi(Calif), Ngan Nguyen(Calif), dr3dd, Milad Nasr, Nicholas Carlini with Claude, Anthropic, 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), Brendon Tiszka(Google Project Zero), Seiji Sakurai@@HeapSmasher, CVE-2025-14017, CVE-2025-14819, Kun Peeks@@SwayZGl1tZyyy, Aswin Kumar Gokula Kannan, 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), Pan ZhenPeng@@Peterpan0927(STAR Labs SG Pte), Amy (amys.website), YingQi Shi@@Mas0nShi(DBAppSecurity's WeBin lab), David Ige - Beryllium Security, Gia Bui@@yabeow(Calif), w0wbox, Wang Yu, Stuart Wallace(Totally Not Malicious Software), Rosyna Keller(Totally Not Malicious Software), Jian Lee@@speedyfriend433, Ilya Andr (andrd3v), Gongyu Ma@@Mezone0, David Strnadel, Daniel Febrero, CJ Vana, Cem Onat Karagun, tamdao, Franco Belman at Blackwing Intelligence, Zhongcheng Li(IES Red Team), Ye Zhang@@VAR10CK(Baidu Security), CVE-2026-65414, Rishabh Jain (rjcyber)(cyberplanet), Pasquale Scola, Siyeong kim, Chris Bailey - Short Circuit, AL Najafi, Stuart Wallace, Pavan Nallamothu, N.M.Praveen Nawarathne@@zblockrat, James Gill @infosec.exchange)@@jjtech, Tommy DeVoss@@thedawgyg(Braze Security Team), flower xu, PETOWORKS의 Bugeun Choi@@Bugeun, Hyunwoo Kim@@v4bel, Daisuke Hatakeyama, Ryohei Ueki Research)@@SYZD, Meta Red Team X - Nik Tsytsarkin, Geoffrey Lovelace, Bruce Dang(Calif), Jiyong Yang, Justin O'Leary, 진규정 (Gyujeong Jin, @@G1uN4sh, Niels Hofmans, Meta Red Team X, Geonha Lee@@leegn4a, Mateusz Jurczyk(Google Project Zero), Varik Matevosyan, Lyutoon, Dun, Bernhard Jackiewicz, Svetoslav Stolarov & Aisa Fox(Calif), Josh Maine(Calif), genter0, R4mbb(KRsecurity), Vladislav Shevchenko (Positive Technologies), Hiroki Imai (LAC Co., Ltd.), Fábio Luís@@scanpt(STAR Labs SG Pte), Richard Zana(STAR Labs SG Pte), Bhaswanth Chigurupati, Kitten Food, Matthew Zamat, Rodolphe Brunetti@@eisw0lf(Lupus Nova), Drin Raci(sentry), Stanislav Jelezoglo, Sindre Sorhus(IES Red Team), Hoffcona(IES Red Team), Hongsik Kim (mnur), stratan@@5tratan, Rahul Raj, Narendra Singh@@_3P1C, Surya Narayan Kushwaha, Roman Zabicki, John Lussier, Filip Olszak, Abodi Dawoud, Ujjwal Reddy Kalvolu Sreenivasa Reddy, Johan Wahyudi, Armend Gashi, Lehan Dilusha Jayasingha, 이재영(Positive Technologies), Seung Je Seong(Positive Technologies), Jakob Pammer(Positive Technologies), Ilya Andr (andrd3v)(Positive Technologies), Jérôme Djouder, Sindre Sorhus, Constantin Clerc(Calif), Shad J(Calif), Huy Nguyen@@34306(Calif), huami1314@@huamidev, OGINOME Tomohito, Peter Malone(cyberplanet), Nicolas Rabrenovic(cyberplanet), Irvin Wang(cyberplanet), Seonung Park, ALTV!ST (altvi.st/), Xint Code, Daniel Williams, Arni Hardarson (Neonix Security), ret2happy, Mathis Mansière, James Duffy@@0x4A616D657344, CVE-2026-3784, CVE-2026-3783, Huỳnh Tấn Ngàn, Manuel Fernandez (Stackhopper Security), Stanislav Jelezoglo(Positive Technologies), Redon Gashi, Jonathan Alush-Aben, hxr1(STAR Labs SG Pte), Hiroki Imai (LAC Co.(STAR Labs SG Pte), Ltd.)(STAR Labs SG Pte), Ashish Kunwar(MurphySec), f0r(MurphySec), Mahmoud Abdelmoniem(ThreatBook), Feng Xue(ThreatBook), XGPT(ThreatBook), Nicolas Rabrenovic, Fábio Luís@@scanpt, DARKNAVY@@DarkNavyOrg, Gor Aleksanyan, Michal Kosiorek, Eddy Tsalolikhin, Asjid Kalam@@odinshell, Hyunwoo Kim@@v4bel(ThreatBook), Lukas Gerlach, Wang Yu(STAR Labs SG Pte), Ernesto Martínez García, Calif Research, Ji'an Zhou, Mingxuan Yang, Ye Zhang, Vladislav Shevchenko (Positive Technologies)(STAR Labs SG Pte), Pasquale Scola(STAR Labs SG Pte), CVE-2026-4424, Robert Mindo, Daisuke Hatakeyama Research)@@SYZD, Richard Zana(Nosebeard Labs), Steven Zhao (zhao.io), wh0am1i, Francisco Knabe, Nik Tsytsarkin, OpenAI Codex Security - Amy Burnett, wwwlk, Gurpreet Shergill(Calif), Rhyru9, Merrick Hare, Kwak Kiyong, Song Nuri, Khai Tran, Gurpreet Shergill, Drinor Selmanaj (Sentry), Utkarsh Pal, Ignacio Sanmillan@@ulexec, Using GLM(Z), stratan@@5tratan(Almamater Technologies), Soyeon Park(DEVCORE Research Team), Amy Burnett(DEVCORE Research Team), Khai Tran(DEVCORE Research Team), sherkito(DEVCORE Research Team), Kota Toda(DEVCORE Research Team), HexRabbit@@h3xr4bb1t(DEVCORE Research Team), NiNi@@terrynini38514(DEVCORE Research Team), Brian Carpenter, Janggoon Lee(Out of Bounds), Josef Korbel, Josef Korbel (Citadelo)(Cisco Talos), Claudio Bozzato(Cisco Talos), Francesco Benvenuto(Cisco Talos), Thomas Guillem, Charles Kern, Shubham Chaskar, Seonwook Kim, lattice, Henock Habte, Hossein Lotfi@@hosselot(TrendAI Zero Day Initiative), Utkarsh Pal(Talence Security), Narendra Singh@@_3P1C(Calif), Josef Korbel (Citadelo)(Calif), Юлия Мерцалова, Dung Do@@_piers2(Calif), Muhamad Syaiful, Behzad Najjarpour Jabbari@@_G4ru_, Christian Meurer Xavier, Aaron Grattafiori - NVIDIA AI Red Team, 杉山 壮太, Josef Korbel(Calif), Mohit Negi, Nan Wang@@eternalsakura13, CVE-2026-28979, Shaheen Fazim, 이재영(Appknox), Vinay Kumar Rasala (Xplo8E)(Appknox), Jorge Welch@@jorgwelch, Adam Franke(CyStack), Trung Nguyen@@everping(CyStack), Bartlomiej Dmitruk(striga), Stanislaw Strzalkowski(isec), Pinak Oza, lokerxx(Economics), Narendra Singh@@_3P1C(Economics), Lyutoon(Economics), Jordy Zomer@@pwningsystems(Economics), Richard Zana(Economics), George Stergiopoulos(Economics), InfoSec lab(Economics), Athens University(Economics), Business, Greece, Aswin Kumar Gokulakannan, 이재영, Jared Reyes, Gergely Kalman@@gergely_kalman, Matthew Schneider, Dallas Dubs(Nosebeard Labs), Aaron Grattafiori - NVIDIA AI Red Team(Nosebeard Labs), XBreach.ai(Nosebeard Labs), Yongyue WANG AKA Brian.W(OKX security), Roman Zabicki(Nosebeard Labs), Katika Mohaseen(Nosebeard Labs), an anonymous researcher(Nosebeard Labs), HvxyZLF, Lance Cain - Offensive Security Engineer, SpecterOps Inc., Jonathan Bar Or@@yo_yo_yo_jbo, Anthony Laou Hine Tsuei@@anarcheuz, Gil Portnoy & Henry, Ayaan Ahmad, erdene-och Byambabayar, Atul R V & Ashmit Sharma, Hcamael, 章鱼哥 （aipyaipy.com）@@aipy, Alfredo Pesoli@@__rev(Bynar), Igor Ushakov, Adam Doupé(ASU SEFCOM), Kirin@@Pwnrin(Fudan University), LFY@@secsys(Fudan University), Mickey Jin@@patch1t, Koh M. Nakagawa@@tsunek0h(FFRI Security Inc), Matej Moravec@@MacejkoMoravec, 九宫格(Chongqing Telecom), Chanwit Muenprakoddee (ChemIndy), Aethel-Systems, Narcis Oliveras Fontàs, Zachary Neal(Stripe), Hcamael(Stripe), 章鱼哥 (aipyaipy.com)@@aipy(Stripe), JC Alvarado(Stripe), Jacob Hazak, @@pixiepointsec, Junming C.(Chapoly1305), Vivek Dhar, ASI (RM) in Border Security Force, FTR HQ BSF Kashmir, He Wei (ギカク)(Cisco Talos), Tien-Chih Lin(CyCraft Technology), Pyrophoria, Estifanos Megersa, Ahmed Uddin, yk lin@@pixiepointsec, silo, wdszzml(Bynar), Atuin Automated Vulnerability Discovery Engine(Bynar)

Affected Software

14 affected componentsFixes available
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 macOS Sequoia<15.7.8
15.7.8
Apple macOS Sonoma<14.8.8
14.8.8
Apple iOS<18.7.10
18.7.10
Apple iPadOS<18.7.10
18.7.10
Apple iPadOS<26.5
Apple iPhone OS<26.5
Apple macOS>=26.0<26.5
Apple tvOS<26.5
Apple WatchOS<26.5

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 26.7
  3. Upgrade

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

    Fixed in 18.7.10
  4. Upgrade

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

    Fixed in 15.7.8
  5. Upgrade

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

    Fixed in 14.8.8

Event History

May 11, 2026
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
DescriptionWeakness
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
Affected Software
CVE Published
via MITRE·08:08 PM
Data Sourced
via MITRE·08:08 PM
DescriptionWeakness
Data Sourced
via NVD·09:19 PM
DescriptionSeverityWeaknessAffected Software
Jul 27, 2026
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Aug 17, 2026
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
Affected Software
Sep 14, 2026
Updated
via Apple·12:00 AM
DescriptionWeakness

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-2026-43661?

CVE-2026-43661 is considered a high severity vulnerability due to its potential to allow arbitrary memory corruption.

2

How do I fix CVE-2026-43661?

To fix CVE-2026-43661, update your device to iOS 26.5, iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, or watchOS 26.5.

3

What impact does CVE-2026-43661 have on my device?

CVE-2026-43661 can lead to a buffer overflow issue that may compromise process memory when processing maliciously crafted images.

4

Which Apple products are affected by CVE-2026-43661?

CVE-2026-43661 affects multiple Apple products including iOS, iPadOS, macOS Tahoe, tvOS, and watchOS versions prior to 26.5.

5

Is CVE-2026-43661 a remote code execution vulnerability?

No, CVE-2026-43661 is primarily a memory corruption vulnerability rather than a direct remote code execution vulnerability.

Company

Resources

Contact

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