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WebKit CVE-2026-28904

| EUVD-2026-29229 HIGH
Buffer Overflow (CWE-119)
2026-05-11 apple GHSA-x38g-jvpg-6w2f
7.5
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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 - 14:23 vuln.today
CVSS changed
May 12, 2026 - 14:22 NVD
7.5 (HIGH)
Patch available
May 11, 2026 - 22:03 EUVD
CVE Published
May 11, 2026 - 20:07 nvd
UNKNOWN (no severity yet)
CVE Published
May 11, 2026 - 20:07 nvd
HIGH 7.5

DescriptionNVD

The issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, 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 process crash.

AnalysisAI

Memory corruption in WebKit across Apple's ecosystem enables confidentiality breach via malicious web content without user interaction. Affects iOS/iPadOS versions prior to 18.7.9 and 26.5, macOS Tahoe prior to 26.5, and all Apple operating systems (tvOS, visionOS, watchOS) prior to 26.5. …

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RemediationAI

Within 24 hours: Inventory all Apple devices running iOS/iPadOS <18.7.9, macOS Tahoe <26.5, tvOS <26.5, visionOS <26.5, and watchOS <26.5. Within 7 days: Deploy iOS/iPadOS 18.7.9 or later, macOS Tahoe 26.5 or later, and equivalent versions for tvOS, visionOS, and watchOS to all user and corporate devices. …

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CVE-2026-28904 vulnerability details – vuln.today

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