An injection issue was addressed with improved validation. This issue is fixed in Safari 17.4, macOS Sonoma 14.4, iOS 17.4 and iPadOS 17.4, watchOS 10.4, tvOS 17.4. A maliciously crafted webpage may be able to fingerprint the user.
https://support.apple.com/en-us/HT214089
https://support.apple.com/en-us/HT214088
https://support.apple.com/en-us/HT214086
https://support.apple.com/en-us/HT214084
https://support.apple.com/en-us/HT214081
http://www.openwall.com/lists/oss-security/2024/03/26/1
http://seclists.org/fulldisclosure/2024/Mar/25
http://seclists.org/fulldisclosure/2024/Mar/24