CVE-2025-43526
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Apple Safari
PublishedDec 17, 2025
First seenDec 17, 2025
Weakness typeCWE-601Open redirect
How to fix
Update
- apple safari26.2 or later
- apple macos26.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apple safari | v < 26.2 | 26.2 |
| apple macos | v < 26.2 | 26.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.