CVE-2026-43804 Denial of service in Safari
Visiting a malicious website can cause the Safari browser to crash, resulting in a denial of service for the user.
- 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-2026-43804?
CVE-2026-43804 is a medium-severity denial of service vulnerability in Apple Ipados, published on 27 Jul 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
This issue was addressed through improved state management. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6. Visiting a website may lead to an app denial-of-service.
Weakness: CWE-400
Which versions are affected by CVE-2026-43804?
It affects 5 products.
Products include Apple Ipados, Apple Iphone Os, Apple Macos, Apple Safari, Apple Visionos.
How do I fix CVE-2026-43804?
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-2026-43804 being exploited?
There is no known exploitation of CVE-2026-43804 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-2026-43804, ECHO-c1ff-2e31-6166, GHSA-mj89-jhh3-3x9r, UBUNTU-CVE-2026-43804.