iOS 26.4.2 and iOS 18.7.8—Update Now Warning Issued To iPhone Users

InnovationCybersecurityiOS 26.4.2 and iOS 18.7.8—Update Now Warning Issued To iPhone UsersByKate O'Flaherty,Senior Contributor.Forbes contributors publish independent expert analyses and insights. Kate O’Flaherty is a cybersecurity and privacy journalist. Follow AuthorApr 23, 2026, 03:47am EDTApr 23, 2026, 03:51am EDT--:-- / --:--This voice experience is generated by AI. Learn more.This voice experience is generated by AI. Learn more.Apple's iOS 26.4 and iOS 18.7.8 fix the same flaw, in Notification Services, where notifications marked for deletion could be unexpectedly retained on the device.Apple iPhoneApple has released iOS 26.4.2 and iOS 18.7.8, along with a warning to update your iPhone now. That’s because iOS 26.4 and iOS 18.7.8 fix a single security vulnerability in the iPhone software, which could be pretty serious. Apple doesn’t provide much detail about what’s fixed in iOS 26.4.2 and iOS 18.7.8, to allow as many users to upgrade before attackers can get hold of the details. But it does reveal that iOS 26.4 and iOS 18.7.8 fix the same flaw, in Notification Services, where notifications marked for deletion could be unexpectedly retained on the device, according to Apple’s support page.Tracked as CVE-2026-28950, it seems the issue was released as an emergency update for a reason. It appears to be the same vulnerability used by the FBI to extract copies of incoming Signal messages from a defendant’s iPhone due to copies of the content being saved in the push notification database, first reported by 404 Media.While Apple doesn’t comment on the details of the fixes in iOS 18.7.8 and iOS 26.4.2, Bleeping Computer points out that “its description of notifications being retained on the device closely aligns with the type of data persistence described in that report.”I have asked Apple to comment and will update this article if the iPhone maker responds.MORE FOR YOUiOS 18.7.8 Is Also Available For Newer iPhonesAnother security implication of this latest up...