Critical severity · published Dec 17, 2025
CVE-2025-43526
This issue was addressed with improved URL validation
9.8
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
macOS · Apple
before 26.2 · source: NVD
SA
Safari · Apple
before 26.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-43526
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-43526
Release Notes
https://support.apple.com/en-us/125886
Release Notes
https://support.apple.com/en-us/125892
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