CVE-2025-43464 Denial of service in macOS
Visiting a malicious website can cause an application denial-of-service on macOS, requiring users to update their operating system.
- 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
- None listed
What is CVE-2025-43464?
CVE-2025-43464 is a medium-severity denial of service vulnerability in Apple Macos, published on 12 Dec 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
A denial-of-service issue was addressed with improved input validation. This issue is fixed in macOS Tahoe 26.1. Visiting a website may lead to an app denial-of-service.
Weakness: CWE-20
Which versions are affected by CVE-2025-43464?
It affects 1 product.
Products include Apple Macos.
How do I fix CVE-2025-43464?
No fix has been published for CVE-2025-43464 yet. Limit exposure of the affected software until one is available.
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-2025-43464 being exploited?
There is no known exploitation of CVE-2025-43464 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as GHSA-8mc4-q7gv-xrqv.