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WebKit CVE-2026-28947

| EUVDEUVD-2026-29255 HIGH
Use After Free (CWE-416)
2026-05-11 apple GHSA-52pv-8487-c6jp
Denial Of Service Use After Free Memory Corruption Apple Tvos Visionos Watchos Ios And Ipados
8.8
CVSS 3.1 · Vendor: apple
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Severity by source

Vendor (apple) PRIMARY
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SUSE
HIGH
qualitative
Red Hat
8.8 HIGH
qualitative

Primary rating from Vendor (apple).

CVSS VectorVendor: apple

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
May 12, 2026 - 18:24 vuln.today
CVSS changed
May 12, 2026 - 18:22 NVD
8.8 (HIGH)
Patch available
May 11, 2026 - 22:03 EUVD
CVE Published
May 11, 2026 - 20:08 nvd
UNKNOWN (no severity yet)
CVE Published
May 11, 2026 - 20:08 nvd
HIGH 8.8

DescriptionCVE.org

A use-after-free issue was addressed with improved memory management. This issue is fixed in iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected Safari crash.

AnalysisAI

Use-after-free in WebKit allows remote attackers to trigger Safari crashes and potentially achieve arbitrary code execution across Apple's entire ecosystem (iOS, iPadOS, macOS, tvOS, visionOS, watchOS) via maliciously crafted web content. Users must visit or be tricked into visiting a malicious webpage (UI:R). Despite CVSS 8.8 (High) with theoretical code execution impact (C:H/I:H/A:H), EPSS probability is extremely low (0.02%, 5th percentile), indicating minimal observed exploitation activity. No public exploit identified at time of analysis, and vendor patches are available across all platforms as of version 26.5.

Technical ContextAI

This vulnerability affects WebKit, Apple's browser engine underlying Safari and in-app web views across all Apple platforms. The root cause is CWE-416 (Use-After-Free), a memory corruption class where code references memory after it has been freed, creating a dangling pointer. In WebKit's case, this occurs during processing of web content-likely in the HTML parser, JavaScript engine, or DOM manipulation code. Use-after-free bugs are particularly dangerous because attackers can control the freed memory region through heap spraying or grooming techniques, potentially redirecting program execution. The CPE strings (cpe:2.3:a:apple:ios_and_ipados, cpe:2.3:a:apple:macos, etc.) confirm this affects WebKit implementations across iOS/iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS prior to version 26.5. The simultaneous patching across all Apple platforms indicates a shared WebKit codebase vulnerability rather than platform-specific issues.

RemediationAI

Apply vendor-released patches by upgrading to version 26.5 or later for all affected platforms: iOS 26.5, iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5. Installation instructions and download links are available through Apple's support pages (references listed above) or through standard over-the-air update mechanisms on each device. For environments unable to immediately patch, implement compensating controls: deploy web filtering to block access to known-malicious domains, restrict Safari/WebKit usage to trusted sites only via Mobile Device Management (MDM) policies on iOS/iPadOS, or temporarily switch to alternative browsers on macOS (though this breaks application integration dependencies). Note that blocking all web content significantly impacts user productivity, and alternative browsers on iOS still use WebKit rendering engine per Apple's App Store requirements, limiting mitigation effectiveness. Short-term workarounds are impractical for most organizations-prioritize rapid patch deployment instead.

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Same weakness CWE-416 – Use After Free

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Same technique Denial Of Service

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Vendor StatusVendor

SUSE

Severity: High
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Module for Basesystem 15 SP7 Fixed
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Fixed
SUSE Linux Enterprise Module for Development Tools 15 SP7 Fixed

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CVE-2026-28947 vulnerability details – vuln.today
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