Safari 18.6 Security Update

What Safari 18.6 Fixes

Safari 18.6, released July 30, 2025, fixes 17 vulnerabilities in 4 parts of the system, according to Apple's security advisory.

Apple does not say that any of them were exploited before the fix. That makes Safari 18.6 a routine security update: worth installing soon, not an emergency.

It has since been superseded: the newest security release for Safari is Safari 27.2, from October 26, 2026, which includes these fixes.

Grouped by us from the impact Apple gives for each fix; the impact lines below are Apple's own.

Which Devices Get Safari 18.6

Apple lists Safari 18.6 for: macOS Ventura and macOS Sonoma.

How to Install Safari 18.6

Safari updates arrive through Software Update on the Mac. On a current macOS they are part of the macOS update; on older versions they are offered separately.

Security fixes are cumulative: any later release for the same version includes these as well, so if you are already past Safari 18.6 there is nothing to do.

Every Fix in Safari 18.6

All 17 CVEs in Apple's advisory, the most serious kinds first. Each entry is the part of the system affected, Apple's description of the impact and the fix, and the CVE ID.

• WebKit

  Processing maliciously crafted web content may disclose sensitive user information

  This issue was addressed through improved state management.

  CVE-2025-43227

• WebKit

  Visiting a malicious website may lead to address bar spoofing

  The issue was addressed with improved UI.

  CVE-2025-43228

• libxml2

  Processing a file may lead to memory corruption

  This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org .

  CVE-2025-7425

• libxslt

  Processing maliciously crafted web content may lead to memory corruption

  This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org .

  CVE-2025-7424

• Safari

  Processing maliciously crafted web content may lead to an unexpected Safari crash

  A logic issue was addressed with improved checks.

  CVE-2025-24188

• WebKit

  Processing maliciously crafted web content may lead to memory corruption

  The issue was addressed with improved memory handling.

  CVE-2025-31278 CVE-2025-31277 CVE-2025-31273

• WebKit

  Processing maliciously crafted web content may lead to an unexpected Safari crash

  The issue was addressed with improved memory handling.

  CVE-2025-43214 CVE-2025-43213 CVE-2025-43212

• WebKit

  Processing web content may lead to a denial-of-service

  The issue was addressed with improved memory handling.

  CVE-2025-43211

• WebKit

  Processing maliciously crafted web content may lead to an unexpected Safari crash

  A use-after-free issue was addressed with improved memory management.

  CVE-2025-43216

• WebKit

  Processing maliciously crafted web content may lead to an unexpected Safari crash

  This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org .

  CVE-2025-6558

• WebKit

  Processing maliciously crafted web content may lead to universal cross site scripting

  This issue was addressed through improved state management.

  CVE-2025-43229

• WebKit

  A download's origin may be incorrectly associated

  A logic issue was addressed with improved checks.

  CVE-2025-43240

• WebKit

  Processing maliciously crafted web content may disclose internal states of the app

  An out-of-bounds read was addressed with improved input validation.

  CVE-2025-43265

Safari Security Release History

Safari 18.6 in context: the security releases Apple has published for Safari, newest first, with the number of fixes each carried.

The Same Fixes Elsewhere

Apple ships most fixes to every platform that shares the code, and to older versions still under support. These releases close at least one of the same CVEs:

Frequently Asked Questions