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Apple WebKit CVE-2026-28902

| EUVDEUVD-2026-29227 MEDIUM
Buffer Overflow (CWE-119)
2026-05-11 apple GHSA-9rrc-92m2-c228
Apple Buffer Overflow Ios And Ipados Tvos Visionos Watchos
6.5
CVSS 3.1 · Vendor: apple
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Severity by source

Vendor (apple) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SUSE
MEDIUM
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
None
Integrity
None
Availability
High

Lifecycle Timeline

5
Analysis Generated
Jun 08, 2026 - 12:48 vuln.today
CVSS changed
May 13, 2026 - 16:22 NVD
6.5 (MEDIUM)
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
MEDIUM 6.5

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, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected process crash.

AnalysisAI

Web content processing across all major Apple platforms is vulnerable to a memory mismanagement flaw (CWE-119) that causes an unexpected process crash when a user visits or renders attacker-controlled web content. Affected platforms include iOS/iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS - all versions prior to the 26.5 release line. The impact is limited to availability (A:H), with no confidentiality or integrity exposure per the CVSS vector, and no active exploitation is confirmed - EPSS sits at 0.02% (5th percentile) and SSVC rates exploitation as none, making this a moderate-priority patch rather than an emergency response item.

Technical ContextAI

The vulnerability resides in Apple's web content processing subsystem, almost certainly WebKit - the browser engine underpinning Safari and all in-app web views across Apple platforms. CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) covers the root cause class: the engine performs a memory operation (read, write, or both) outside the intended buffer boundary when parsing or rendering maliciously crafted content. Apple's advisory language ('addressed with improved memory handling') is consistent with a bounds-check fix or guard-page insertion. The CPE strings confirm the affected surface spans cpe:2.3:a:apple:ios_and_ipados, cpe:2.3:a:apple:macos, cpe:2.3:a:apple:tvos, cpe:2.3:a:apple:visionos, and cpe:2.3:a:apple:watchos - all sharing the same WebKit codebase, which explains the simultaneous cross-platform patching. The tags referencing Red Hat and Suse likely reflect third-party tracker metadata (VulnDB/EUVD indexing distributors that monitor the CVE) rather than indicating those platforms are directly affected.

RemediationAI

The primary fix is to apply the vendor-released patches across all affected platforms: upgrade to iOS 26.5 and iPadOS 26.5 (https://support.apple.com/en-us/127110, https://support.apple.com/en-us/127115), macOS Tahoe 26.5 (https://support.apple.com/en-us/127118), tvOS 26.5 (https://support.apple.com/en-us/127119), visionOS 26.5 (https://support.apple.com/en-us/127120), and watchOS 26.5 (https://support.apple.com/en-us/127121). These are available through standard Apple Software Update channels and MDM deployment pipelines. Where immediate patching is not feasible, compensating controls include restricting access to untrusted web content by disabling Safari's ability to open arbitrary URLs from external sources, deploying a web content filter or DNS-based block list to prevent navigation to unknown domains, and disabling JavaScript execution in WebKit-based in-app browsers where business workflows permit - note that disabling JavaScript broadly will break most modern web applications and is generally only viable in kiosk or restricted-use deployments. No workaround fully substitutes for the patch since the crash surface exists anywhere WebKit processes content.

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Same weakness CWE-119 – Buffer Overflow

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Vendor StatusVendor

SUSE

Severity: Medium
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-2026-28902 vulnerability details – vuln.today
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