CVE-2026-28847: Apple Safari Regular Expression Duplicate Named Groups Heap-based Buffer Overflow Remote Code Execution Vulnerability
Published May 11, 2026
·Updated
Accelerate. An out-of-bounds read was addressed with improved bounds checking.
Other sources
Accounts. A permissions issue was addressed with additional restrictions.
— Apple
Accounts. An authorization issue was addressed with improved state management.
— Apple
APFS. A buffer overflow was addressed with improved bounds checking.
— Apple
App Intents. A logic issue was addressed with improved restrictions.
— Apple
AppleJPEG. A memory corruption issue was addressed with improved input validation.
— Apple
Credit
Vaagn Vardanian, Nathaniel Oh@@calysteon, beist, Yiğit Can YILMAZ@@yilmazcanyigit, 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, Calif.io in collaboration with Claude, Anthropic Research, Csaba Fitzl@@theevilbit(Iru), Ryan Hileman via Xint Code (xint.io), Chris Betz(Talence Security), Tristan Madani@@TristanInSec(Talence Security), Dhiyanesh Selvaraj@@redroot97, Ruslan Dautov, Atul R V, Omar Cerrito, Anton Pakhunov, Ricardo Prado, Ian van der Wurff (ian.nl), Michael DePlante@@izobashi(TrendAI Zero Day Initiative), Dan Raviv, Ilya Sc. Jowell A., Peter Malone, Asaf Cohen, Doron Assness, Peter Malone(Supernetworks), Dave G.(Supernetworks), Alex Radocea(Supernetworks), Pan ZhenPeng@@Peterpan0927(STAR Labs SG Pte), Andy Koo@@andykoo(Hexens), Alex Radocea, Amy (amys.website), Andreas Jaegersberger & Ro Achterberg(Nosebeard Labs), YingQi Shi@@Mas0nShi(DBAppSecurity's WeBin lab), an anonymous researcher, David Ige - Beryllium Security, Cantina, Luke Francis, kwak kiyong / kakaogames, Vitaly Simonovich, Adel Bouachraoui, greenbynox, Do Young Park, Yuhao Hu, Yuanming Lai, Chenggang Wu, Zhe Wang, DARKNAVY@@DarkNavyOrg(TrendAI Zero Day Initiative), Anonymous(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, Gia Bui@@yabeow(Calif), w0wbox, Milad Nasr, Nicholas Carlini with Claude, Anthropic, Khiem Tran, Kenneth Hsu(Palo Alto Networks), Jérôme DJOUDER, Wang Yu, Brendon Tiszka(Google Project Zero), Jorge Welch, Adriatik Raci, Abhay Kailasia@@abhay_kailasia(Safran Mumbai India), Seiji Sakurai@@HeapSmasher, Dave G., Vamshi Paili, Tony Gorez for Reverse Society@@tonygo_, CVE-2026-1837, impost0r (ret2plt), David Ige(Beryllium Security), Alan Wang, Christopher W. Fletcher, Hovav Shacham, David Kohlbrenner, Riccardo Paccagnella, Niels Hofmans(TrendAI Zero Day Initiative), Suresh Sundaram, Jiri Ha, Arni Hardarson, Johnny Franks@@zeroxjf, Mihalis Haatainen, Ari Hawking, Ashish Kunwar, Rosyna Keller(Totally Not Malicious Software), Alvin Aries Tapia, XiguaSec, Google Threat Analysis Group, Robert Tran(STAR Labs SG Pte), Chris Betz, Ilya Andr (andrd3v)(Voynich Group), Ilias Morad (A2nkF)(Voynich Group), Duy Trần@@khanhduytran0, @@hugeBlack, Guy Dor, Daniel Rhea(TrendAI Zero Day Initiative), Somair Ansar, Kun Peeks@@SwayZGl1tZyyy, Aswin Kumar Gokula Kannan, wdszzml, Atuin Automated Vulnerability Discovery Engine
Affected Software
17 affected componentsFixes available
Apple macOS Tahoe<26.5
26.5
Apple iOS<26.5
26.5
Apple iPadOS<26.5
26.5
Apple visionOS<26.5
26.5
Apple tvOS<26.5
26.5
Apple WatchOS<26.5
26.5
Apple iOS<18.7.9
18.7.9
Apple iPadOS<18.7.9
18.7.9
Apple Safari<26.5
26.5
Apple iPadOS<18.7.9
Apple iPadOS>=26.0<26.5
Apple iPhone OS<18.7.9
Apple iPhone OS>=26.0<26.5
Apple macOS>=26.0<26.5
Apple tvOS<26.5
Apple visionOS<26.5
Apple WatchOS<26.5
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
Affected Software
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
CVE Published
via MITRE·08:07 PM
Data Sourced
via MITRE·08:07 PM
DescriptionWeakness
Data Sourced
via NVD·09:18 PM
DescriptionSeverityWeaknessAffected Software
May 13, 2026
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Jun 3, 2026
Advisory Published
via ZDI·01:59 PM
Data Sourced
via ZDI·01:59 PM
DescriptionAffected Software
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2026-28991
- CVE-2026-28988
- CVE-2026-28959
- CVE-2026-28995
- CVE-2026-1837
- CVE-2026-28956
- CVE-2026-39869
- CVE-2026-28922
- CVE-2026-28936
- CVE-2026-28918
- CVE-2026-28915
- CVE-2026-43659
- CVE-2026-28923
- CVE-2026-28925
- CVE-2026-43661
- CVE-2026-28977
- CVE-2026-28990
- CVE-2026-28978
- CVE-2026-28992
- CVE-2026-28943
- CVE-2026-28969
- CVE-2026-43655
- CVE-2026-43654
- CVE-2026-28908
- CVE-2026-28954
- CVE-2026-28897
- CVE-2026-28952
- CVE-2026-28951
- CVE-2026-28972
- CVE-2026-28986
- CVE-2026-28987
- CVE-2026-28983
- CVE-2026-28929
- CVE-2026-43653
- CVE-2026-28985
- CVE-2026-43668
- CVE-2026-43666
- CVE-2026-28941
- CVE-2026-28940
- CVE-2026-28961
- CVE-2026-28906
- CVE-2026-43656
- CVE-2026-43652
- CVE-2026-39870
- CVE-2026-28846
- CVE-2026-28993
- CVE-2026-28848
- CVE-2026-28930
- CVE-2026-28974
- CVE-2026-28996
- CVE-2026-28919
- CVE-2026-28924
- CVE-2026-39871
- CVE-2026-28976
- CVE-2026-43660
- CVE-2026-28907
- CVE-2026-28962
- CVE-2026-43658
- CVE-2026-28905
- CVE-2026-28847
- CVE-2026-28904
- CVE-2026-28955
- CVE-2026-28903
- CVE-2026-28953
- CVE-2026-28902
- CVE-2026-28901
- CVE-2026-28913
- CVE-2026-28883
- CVE-2026-28958
- CVE-2026-28917
- CVE-2026-28947
- CVE-2026-28946
- CVE-2026-28942
- CVE-2026-28971
- CVE-2026-28944
- CVE-2026-28819
- CVE-2026-28994
- CVE-2026-28914
- CVE-2026-28920
- CVE-2026-28964
- CVE-2026-28963
- CVE-2026-28957
- CVE-2026-28965
- CVE-2026-28877
- CVE-2026-28872
- CVE-2026-28894
- CVE-2026-28870
- CVE-2026-28882
- CVE-2026-28873
Frequently Asked Questions
1
What is the severity of CVE-2026-28847?
CVE-2026-28847 is classified as a moderate severity vulnerability that affects multiple Apple operating systems.
2
How do I fix CVE-2026-28847?
To fix CVE-2026-28847, upgrade your affected Apple operating system to the latest version specified by the vendor.
3
What systems are affected by CVE-2026-28847?
CVE-2026-28847 affects macOS Tahoe, iOS, iPadOS, visionOS, tvOS, watchOS, and Safari versions up to 26.5.
4
What type of vulnerability is CVE-2026-28847?
CVE-2026-28847 includes an out-of-bounds read, buffer overflow, and issues with permissions and authorization.
5
Are there workarounds for CVE-2026-28847?
There are no official workarounds for CVE-2026-28847; applying the latest updates is the recommended course of action.