Apple fixes iOS 26.4.2 flaw that let FBI view deleted Signal previews

Apple released iOS 26.4.2 and iPadOS 26.4.2 (along with iOS 18.7.8/iPadOS 18.7.8) to fix a security flaw in notification services that could retain Signal message previews on a device, enabling the FBI to access message content via the internal notification database even after deletion. Apple says the fix improves data redaction to prevent this logging/retention of sensitive content. The issue came to light in court testimony about FBI access to the device’s notification data. Users on affected versions should update to the latest software to mitigate exposure.