Safari 26.6 Security Update

What Safari 26.6 Fixes

Safari 26.6, released July 27, 2026, fixes 10 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 26.6 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It has since been superseded: the newest security release for Safari is Safari 27.2, from October 26, 2026, which includes these fixes.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 26.6

Apple lists Safari 26.6 for: macOS Sonoma and macOS Sequoia.

How to Install Safari 26.6

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 26.6 there is nothing to do.

Every Fix in Safari 26.6

All 10 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

  Maliciously crafted web content may violate iframe sandboxing policy

  A permissions issue was addressed with improved validation.

  CVE-2026-64728

• WebKit

  An app may be able to read files outside of its sandbox

  An access issue was addressed with improved access restrictions.

  CVE-2026-43821

• Safari

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-43792

• WebKit

  Visiting a website that frames malicious content may lead to UI spoofing

  The issue was addressed with improved UI.

  CVE-2026-64730

• 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-2026-64783

• WebKit

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

  A memory corruption issue was addressed with improved state management.

  CVE-2026-64757

• WebKit

  Visiting a website may lead to an app denial-of-service

  This issue was addressed through improved state management.

  CVE-2026-43804

• WebKit Canvas

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

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

  CVE-2026-64718

• WebRTC

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

  An out-of-bounds access issue was addressed with improved bounds checking.

  CVE-2026-64719

• WebKit

  Websites may know if the user has visited a given link

  This issue was addressed with improved checks.

  CVE-2026-64713

Safari Security Release History

Safari 26.6 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