CVE-2026-28879 | Apple iOS/iPadOS/macOS/tvOS/visionOS/watchOS up to 18.7.6/26.3 Web use after free

VDB-352957 · CVE-2026-28879 · GCVE-0-2026-28879 APPLE IOS/IPADOS/MACOS/TVOS/VISIONOS/WATCHOS UP TO 18.7.6/26.3 WEB USE AFTER FREE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.1 $25k-$100k 3.96+ Summaryinfo A vulnerability has been found in Apple iOS, iPadOS, macOS, tvOS, visionOS and watchOS up to 18.7.6/26.3 and classified as critical. Affected by this vulnerability is an unknown functionality of the component Web Handler. This manipulation causes use after free. This vulnerability is tracked as CVE-2026-28879. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded. Detailsinfo A vulnerability has been found in Apple iOS, iPadOS, macOS, tvOS, visionOS and watchOS up to 18.7.6/26.3 and classified as critical. Affected by this vulnerability is an unknown part of the component Web Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect availability. The summary by CVE is: A use-after-free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. Processing maliciously crafted web content may lead to an unexpected process crash. The advisory is shared at support.apple.com. This vulnerability is known as CVE-2026-28879 since 03/03/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $25k-$100k at the moment (estimation calculated on 03/25/2026). Upgrading to version 18.7.7 or 26.4 eliminates this vulnerability. Productinfo Type Smartphone Operating System Vendor Apple Name iOS iPadOS macOS tvOS visionOS watchOS Version 18.7.0 18.7.1 18.7.2 18.7.3 18.7.4 18.7.5 18.7.6 26.0 26.1 26.2 26.3 License commercial Website Vendor: https://www.apple.com/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.3 VulDB Meta Temp Score: 4.1 VulDB Base Score: 4.3 VulDB Temp Score: 4.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Use after free CWE: CWE-416 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: iOS/iPadOS/macOS/tvOS/visionOS/watchOS 18.7.7/26.4 Timelineinfo 03/03/2026 CVE reserved 03/25/2026 +22 days Advisory disclosed 03/25/2026 +0 days VulDB entry created 03/25/2026 +0 days VulDB entry last update Sourcesinfo Vendor: apple.com Advisory: support.apple.com Status: Confirmed CVE: CVE-2026-28879 (🔒) GCVE (CVE): GCVE-0-2026-28879 GCVE (VulDB): GCVE-100-352957 scip Labs: https://www.scip.ch/en/?labs.20180712 Entryinfo Created: 03/25/2026 07:52 Changes: 03/25/2026 07:52 (57) Complete: 🔍 Cache ID: 99:FD2:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸