CVE-2025-43526

Safari: 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

CVE-2025-43526 is fixed in Tahoe on 1 platform by Tahoe 26.2 (version 26.2), released December 12, 2025. It is not reported as exploited. Patch Radar priority: Urgent.

Urgent

CVSS

9.8

CRITICAL

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0053

45th percentile

This issue was addressed with improved URL validation.

Where it's fixed

Product	Fixed in	Fix	Released
macOS
Tahoe	26.2	Tahoe 26.2	Dec 12, 2025

Details

Published
December 12, 2025
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor advisory
https://support.apple.com/en-us/125886

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