The issue was addressed with improved handling of caches. This issue is fixed in tvOS 26.1, watchOS 26.1, macOS Tahoe 26.1, iOS 26.1 and iPadOS 26.1, Safari 26.1, iOS 18.7.2 and iPadOS 18.7.2, visionOS 26.1. A website may exfiltrate image data cross-origin.
https://support.apple.com/en-us/125640
https://support.apple.com/en-us/125639
https://support.apple.com/en-us/125638
https://support.apple.com/en-us/125637
https://support.apple.com/en-us/125634