CVE-2026-43740 Use after free in Safari
Processing maliciously crafted web content may result in the disclosure of process memory in Apple Safari and related operating systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-43740?
CVE-2026-43740 is a medium-severity use after free vulnerability in Apple Ipados, published on 29 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may result in the disclosure of process memory.
Which versions are affected by CVE-2026-43740?
It affects 4 products.
Products include Apple Ipados, Apple Iphone Os, Apple Macos, Apple Safari.
How do I fix CVE-2026-43740?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-43740 being exploited?
There is no known exploitation of CVE-2026-43740 in the wild and no public exploit code.
Other vulnerabilities in Apple Ipados
- CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write
- CVE-2025-24201 Apple Multiple Products WebKit Out-of-Bounds Write
- CVE-2025-24085 Apple Multiple Products Use-After-Free
- CVE-2025-31200 Apple Multiple Products Memory Corruption
- CVE-2025-31201 Apple Multiple Products Arbitrary Read and Write
Sources
Also known as DEBIAN-CVE-2026-43740, ECHO-af42-4f18-f2fa, GHSA-xxx6-g6jv-xq96, UBUNTU-CVE-2026-43740.