Safari 26.5.2 Security Update

What Safari 26.5.2 Fixes

Safari 26.5.2, released June 29, 2026, fixes 31 vulnerabilities in 5 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 26.5.2 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It has since been superseded: the newest security release for Safari is Safari 27.2, from October 26, 2026, which includes these fixes.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 26.5.2

Apple lists Safari 26.5.2 for: macOS Sonoma and macOS Sequoia.

How to Install Safari 26.5.2

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 26.5.2 there is nothing to do.

Every Fix in Safari 26.5.2

All 31 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

  A malicious website may be able to process restricted web content outside the sandbox

  The issue was addressed with improved input validation.

  CVE-2026-43725

• WebKit

  A malicious website may be able to process restricted web content outside the sandbox

  The issue was addressed with improved checks.

  CVE-2026-43701

• WebKit

  Processing maliciously crafted web content may disclose sensitive user information

  A cross-origin issue was addressed with improved tracking of security origins.

  CVE-2026-43700

• WebKit

  Processing maliciously crafted web content may disclose sensitive user information

  A path handling issue was addressed with improved validation.

  CVE-2026-43732

• WebKit

  Visiting a website may leak sensitive data

  A permissions issue was addressed with additional restrictions.

  CVE-2026-43713

• WebKit

  A malicious website may exfiltrate data cross-origin

  The issue was addressed with improved checks.

  CVE-2026-43735

• WebKit

  A malicious website may exfiltrate data cross-origin

  The issue was addressed with improved input validation.

  CVE-2026-43708

• Web Extensions

  A malicious web extension may be able to cause an unexpected process crash

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

  CVE-2026-43704

• WebKit

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

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

  CVE-2026-43734 CVE-2026-43726 CVE-2026-43709 CVE-2026-43699 CVE-2026-43742

• WebKit

  Processing maliciously crafted web content may lead to memory corruption

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

  CVE-2026-43731 CVE-2026-43715

• 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-2026-43727

• WebKit

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

  The issue was addressed with improved memory handling.

  CVE-2026-43663 CVE-2026-39872 CVE-2026-43712

• WebKit

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

  The issue was addressed with improved memory handling.

  CVE-2026-43716

• WebKit

  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-2026-43676

• WebKit

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

  A memory corruption issue was addressed with improved memory handling.

  CVE-2026-43707

• WebKit

  Processing maliciously crafted web content may lead to memory corruption

  A type confusion issue was addressed with improved checks.

  CVE-2026-43705

• WebKit

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

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

  CVE-2026-43745

• 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-2026-43720

• WebRTC

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

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

  CVE-2026-28979

• WebRTC

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

  A stack overflow was addressed with improved input validation.

  CVE-2026-43718

• WebRTC

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

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

  CVE-2026-43717 CVE-2026-43746

• WebKit

  Processing maliciously crafted web content may result in the disclosure of process memory

  The issue was addressed with improved memory handling.

  CVE-2026-43740

• WebKit Storage

  A malicious website may be able to silently hijack clipboard data

  This issue was addressed through improved state management.

  CVE-2026-43721

Safari Security Release History

Safari 26.5.2 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