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WebKit CVE-2026-28905

| EUVDEUVD-2026-29230 HIGH
Buffer Overflow (CWE-119)
2026-05-11 apple GHSA-523x-p7vc-qqv3
Apple Buffer Overflow Ios And Ipados Tvos Visionos
7.5
CVSS 3.1 · Vendor: apple
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Severity by source

Vendor (apple) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

5
Analysis Generated
May 12, 2026 - 17:46 vuln.today
CVSS changed
May 12, 2026 - 15:22 NVD
7.5 (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 7.5

DescriptionCVE.org

The issue was addressed with improved memory handling. This issue is fixed in iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5. Processing maliciously crafted web content may lead to an unexpected process crash.

AnalysisAI

Memory corruption in WebKit across Apple platforms (iOS, iPadOS, macOS, tvOS, visionOS) allows remote attackers to access sensitive information via malicious web content. CVSS vector indicates network-based exploitation requiring no user interaction or authentication (AV:N/AC:L/PR:N/UI:N), contradicting the description's 'process crash' outcome with the High Confidentiality impact rating. EPSS score of 0.02% (5th percentile) suggests low real-world exploitation probability. Vendor patches available for all affected platforms (version 26.5). SSVC framework rates this as automatable with partial technical impact but no observed exploitation.

Technical ContextAI

This vulnerability affects WebKit, Apple's browser engine used across iOS, iPadOS, macOS, tvOS, and visionOS for rendering web content in Safari and in-app web views. Classified as CWE-119 (Improper Restriction of Operations within Memory Buffer Bounds), the flaw represents a buffer overflow or related memory safety issue in WebKit's content processing pipeline. The CPE strings identify all major Apple operating systems as affected, indicating the vulnerability exists in shared WebKit code rather than platform-specific implementations. Memory handling bugs in browser engines are critical attack surfaces because they process untrusted content from arbitrary websites. The CVSS vector's High Confidentiality impact combined with No Integrity/Availability impact suggests potential information disclosure rather than code execution, which conflicts with typical buffer overflow exploitation patterns that usually enable arbitrary code execution (CIA impact).

RemediationAI

Update all affected Apple devices to version 26.5 or later: iOS 26.5 and iPadOS 26.5 for mobile devices, macOS Tahoe 26.5 for desktop systems, tvOS 26.5 for Apple TV devices, and visionOS 26.5 for Vision Pro headsets. Vendor-confirmed patches are available through standard Apple Software Update mechanisms as documented in Apple security advisories HT127110, HT127115, HT127118, and HT127120. For organizations unable to immediately deploy OS updates, implement network-layer web filtering to block access to known malicious domains and restrict web browsing to trusted sites only, though this provides incomplete protection since the vulnerability affects any web content processing including embedded web views in applications. Content Security Policy (CSP) headers and sandboxing of web content do not mitigate this memory corruption issue as it occurs within the rendering engine itself. No effective workaround exists beyond OS update given the fundamental nature of WebKit in the Apple ecosystem-disabling Safari leaves other applications using WebKit web views vulnerable.

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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-2026-28905 vulnerability details – vuln.today
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