CVE-2025-43526

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.

CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-601 CWE-601

Affected Products

Vendor	Product	Versions
apple	safari	< 26.2
apple	macos	< 26.2

References

Advisories & Patches

https://support.apple.com/en-us/125886 https://support.apple.com/en-us/125892

Frequently Asked Questions

What is CVE-2025-43526? +

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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-43526? +

CVE-2025-43526 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-43526? +

CVE-2025-43526 affects products from apple, specifically: macos, safari. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-43526? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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