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A logic issue was addressed with improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. A malicious website may be able to access script message handlers intended for other origins.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade webkitgtk4-jsc-develUpgrade webkitgtk4-develUpgrade webkitgtk4-jscUpgrade webkitgtk4 | May 20, 2026 | May 20, 2026 |
| Apple Osx Webkit | — | Upgrade macOS to the latest version | Mar 27, 2026 | Mar 24, 2026 |
| Apple Safari | — | Upgrade to Apple Safari version 26.4Uninstall Apple Safari on Windows | Mar 27, 2026 | Mar 27, 2026 |
| Debian | — | Upgrade webkit2gtk | Jul 23, 2026 | Jul 23, 2026 |
| Ubuntu | — | Upgrade libjavascriptcoregtk-6.0-1Upgrade libwebkit2gtk-4.1-0Upgrade libjavascriptcoregtk-4.1-0Upgrade libwebkitgtk-6.0-4 | May 6, 2026 | Mar 25, 2026 |
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