apple pushed a crucial iOS security update yesterday (including iOS 18 versions) that fixed the vulnerability that let the FBI snoop on someone's signal messages through the notification cache. recommended to update ASAP

https://www.macrumors.com/2026/04/22/ios-26-4-2-notification-database-security-fix/
iOS 26.4.2 Patches Flaw That Let FBI Extract Deleted Signal Messages

The iOS 26.4.2, iPadOS 26.4.2, iOS 18.7.8, and iPadOS 18.7.8 updates that Apple released today address a security vulnerability that the FBI recently...

MacRumors
@ericjames does it still have the age verification in the UK? If so then no thanks.
@ericjames Never ever set Signal or any E2EE app to display message contents in notifications or worse: lock screen.
@ericjames IMO Signal should remove that feature, it's dangerous, the OS having a bug is just making it worse.