CVE-2025-43430 Denial of service in Safari
Attackers can cause a process crash by tricking users into visiting malicious web content 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-2025-43430?
CVE-2025-43430 is a medium-severity denial of service vulnerability in Apple Ipados, published on 4 Nov 2025. 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
This issue was addressed through improved state management. This issue is fixed in Safari 26.1, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. Processing maliciously crafted web content may lead to an unexpected process crash.
Which versions are affected by CVE-2025-43430?
It affects 6 products.
Products include Apple Ipados, Apple Iphone Os, Apple Safari, Apple Tvos, Apple Visionos, Apple Watchos.
How do I fix CVE-2025-43430?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-43430 being exploited?
There is no known exploitation of CVE-2025-43430 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-2025-43430, GHSA-hmxw-42mv-c458, UBUNTU-CVE-2025-43430.