A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27. Processing maliciously crafted web content may lead to an unexpected process crash.
https://support.apple.com/en-us/149038
https://support.apple.com/en-us/149037
https://support.apple.com/en-us/149036
https://support.apple.com/en-us/148287
https://support.apple.com/en-us/148286