CVE-2025-43526 Security feature bypass in Safari
Attackers can bypass Lockdown Mode restrictions in Safari on macOS by using file URLs to access restricted Web APIs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-43526?
CVE-2025-43526 is a critical vulnerability in Apple Macos, published on 17 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
This issue was addressed with improved URL validation. This issue is fixed in Safari 26.2, macOS Tahoe 26.2. On a Mac with Lockdown Mode enabled, web content opened via a file URL may be able to use Web APIs that should be restricted.
Weakness: CWE-601
Which versions are affected by CVE-2025-43526?
It affects 2 products.
Products include Apple Macos, Apple Safari.
How do I fix CVE-2025-43526?
No fix has been published for CVE-2025-43526 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-43526 being exploited?
There is no known exploitation of CVE-2025-43526 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as GHSA-338x-j9c9-2c8v.