CVE-2026-43746: Use After Free

Published Jun 29, 2026
·
Updated

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected Safari crash.

Other sources

IOGPUFamily. A race condition was addressed with improved state handling.

— Apple

Kernel. The issue was addressed with improved input sanitization.

— Apple

Kernel. This issue was addressed with improved input validation.

— Apple

libxslt. A double free issue was addressed with improved memory management.

— Apple

libxslt. The issue was addressed with improved memory handling.

— Apple

Credit

Vitaly Simonovich, Christian Meurer Xavier, Gurpreet Shergill, Merrick Hare, Drinor Selmanaj (Sentry), Khai Tran, John Lussier, Rhyru9, Kwak Kiyong, Song Nuri, Jonathan Alush-Aben, stratan@@5tratan(Almamater Technologies), Josef Korbel (Citadelo)(Talence Security), Tristan Madani@@TristanInSec(Talence Security), Gia Bui@@yabeow(Calif), Narendra Singh@@_3P1C, CVE-2026-43709, Tommy DeVoss@@thedawgyg(Braze Security Team), Юлия Мерцалова, Nan Wang@@eternalsakura13, dr3dd, Milad Nasr, Nicholas Carlini with Claude, Anthropic, Luke Francis, 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), Using GLM(Z), Brian Carpenter, Utkarsh Pal, Ignacio Sanmillan@@ulexec, Kwak Kiyong(Talence Security), Song Nuri(Talence Security), Maher Azzouzi(Calif), Tuan(Calif), Duc(Calif), OpenAI Codex Security - Amy Burnett, Evan Lambert, Mateusz Krzywicki (iVerify.io)(Braze Security Team), dr3dd(Braze Security Team), Nathaniel Oh@@calysteon, Arni Hardarson, Jody Ritonga, Behzad Najjarpour Jabbari@@_G4ru_, Aaron Grattafiori - NVIDIA AI Red Team, Josef Korbel, Idan Masas, CVE-2026-28979, impost0r (ret2plt), Hyunwoo Kim@@v4bel, Feng Xue(ThreatBook), XGPT(ThreatBook), Vladislav Shevchenko (Positive Technologies)(Baidu Security), Ye Zhang@@VAR10CK(Baidu Security), Billy Jheng Bing Jhong(STAR Labs SG Pte), Pan Zhenpeng@@Peterpan0927(STAR Labs SG Pte), Lyutoon, Dun

Affected Software

8 affected componentsFixes available
Apple iOS<26.5.2
26.5.2
Apple iPadOS<26.5.2
26.5.2
Apple macOS Tahoe<26.5.2
26.5.2
Apple Safari<26.5.2
26.5.2
Apple Safari<26.5.2
Apple iPadOS<26.5.2
Apple iPhone OS<26.5.2
Apple macOS>=26.0<26.5.2

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

Event History

Jun 29, 2026
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
DescriptionWeakness
Updated
via Apple·12:00 AM
Description
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
Affected Software
Updated
via Apple·12:00 AM
DescriptionAffected Software
CVE Published
via MITRE·07:43 PM
Data Sourced
via MITRE·07:43 PM
DescriptionWeakness
Data Sourced
via NVD·08:17 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2026-43746?

CVE-2026-43746 has a risk rating of 60.

2

What vulnerabilities are addressed in CVE-2026-43746?

CVE-2026-43746 addresses issues related to race conditions, input validation, and double free vulnerabilities.

3

How do I fix CVE-2026-43746?

To mitigate CVE-2026-43746, ensure that your Apple iOS, iPadOS, or macOS Tahoe devices are updated to the latest software version.

4

Which Apple products are affected by CVE-2026-43746?

CVE-2026-43746 affects Apple iOS, Apple iPadOS, and Apple macOS Tahoe.

5

What types of coding vulnerabilities are included in CVE-2026-43746?

CVE-2026-43746 includes vulnerabilities related to double free, use after free, input validation, and race conditions.

Company

Resources

Contact

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