Apple Safari 26.5.2 Use-After-Free in Web Extension Causing Crash
CVE-2026-43704 Published on June 29, 2026
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. A malicious web extension may be able to cause an unexpected process crash.
Vulnerability Analysis
CVE-2026-43704 is exploitable with network access, requires user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-43704 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-43704
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Affected Versions
Apple Safari:- Before 26.5.2 is affected.
- Before 26.5.2 is affected.
- Before 26.5.2 is affected.