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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 used to extract Signal message previews from an iPhone even after the app was deleted.

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A flaw with notification services allowed notifications that were supposed to be deleted to be retained on an iPhone or iPad. Apple says it fixed the logging issue with improved data redaction.

Apple became aware of the vulnerability after recent court testimony revealed that the FBI was able to access the internal notification database on an iPhone involved in a case, providing law enforcement with access to message previews. The iPhone in question was set to display the content of Signal messages on the Lock Screen, and with that feature enabled, the iPhone stores message content.

The defendant in the case had deleted the Signal app and had Signal messages set to disappear, but the iPhone kept the messages in its database long enough for the FBI to access them.

Apple users running iOS 26, iPadOS 26, iOS 18, or iPadOS 18 should update to the latest versions to avoid being impacted by the security flaw.

Note: Due to the political or social nature of the discussion regarding this topic, the discussion thread is located in our Political News forum. All forum members and site visitors are welcome to read and follow the thread, but posting is limited to forum members with at least 100 posts.

Related Roundups: iOS 26, iPadOS 26
Tags: FBI, Signal
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Top Rated Comments

Nermal Avatar
3 hours ago at 12:34 pm

Ahh yes, once again Apple protecting criminals.
And everyone else.
Score: 29 Votes (Like | Disagree)
Non-Euclidean Avatar
3 hours ago at 12:22 pm
Updating to spite FBI even though I don't use Signal.
Score: 18 Votes (Like | Disagree)
3 hours ago at 12:15 pm
I hope this incident prompts Apple to take a serious look at other gaps in their privacy model. There are so many cases where they over promise and under deliver. Intent doesn't matter if there are gaping holes like this one.
Score: 14 Votes (Like | Disagree)
Astuces iOS Avatar
3 hours ago at 12:08 pm
Bang bang bang, FBI OPEN UP



Damn FBI should not have access to anything !

Attachment Image
Score: 11 Votes (Like | Disagree)
Techwatcher Avatar
3 hours ago at 12:41 pm

Ahh yes, once again Apple protecting criminals.
If I say what’s really on my mind I’m gonna be suspended for a decade so I’ll behave.
Score: 9 Votes (Like | Disagree)
NightFox Avatar
3 hours ago at 12:39 pm

So I don’t display messages in the lock screen, but this sounds like it’s a signal issue? And why wasn’t the database encrypted?

I hope this incident prompts 3rd party apps to really take a look at their privacy model.
It's not really a Signal issue from what I understand. App notifications work by the app passing the text message to be displayed to iOS which handles the notification message. It can't pass it as encrypted as iOS wouldn't be able to decrypt it to display it. Apps can't serve their own native notifications.
Score: 9 Votes (Like | Disagree)