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Apple WebKit CVE-2026-28901

| EUVDEUVD-2026-29226 MEDIUM
Buffer Overflow (CWE-119)
2026-05-11 apple GHSA-6cxc-cp8p-4h26
Apple Buffer Overflow Ios And Ipados Tvos Visionos Watchos
4.3
CVSS 3.1 · Vendor: apple
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Severity by source

Vendor (apple) PRIMARY
4.3 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
vuln.today AI
4.3 MEDIUM

Network-delivered web content requires active user interaction (UI:R); impact limited to process crash with no confidentiality or integrity effect, so C:N/I:N/A:L.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
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
Low

Lifecycle Timeline

5
Analysis Generated
Jul 23, 2026 - 23:39 vuln.today
CVSS changed
May 12, 2026 - 21:22 NVD
4.3 (MEDIUM)
Patch available
May 11, 2026 - 22:03 EUVD
CVE Published
May 11, 2026 - 20:08 nvd
MEDIUM 4.3
CVE Published
May 11, 2026 - 20:08 nvd
UNKNOWN (no severity yet)

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

Improper memory handling in Apple's web content processing engine triggers an unexpected process crash when a user visits or renders maliciously crafted web content, affecting every current Apple platform. The vulnerability is confirmed patched in iOS 26.5, iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5, and the presence of multiple Red Hat errata references suggests the underlying component (likely WebKitGTK) also carries impact into Linux distributions. No public exploit code and no active exploitation have been identified; EPSS sits at the 5th percentile and CISA SSVC rates exploitation as none.

Technical ContextAI

CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) indicates the root cause is an out-of-bounds memory operation - a class that encompasses buffer overflows, overreads, and adjacent-memory corruption. The description's fix wording ('improved memory handling') is consistent with a bounds check or allocation guard added to the web content parser or renderer. The triggering vector - processing web content - strongly implies the WebKit engine, which is the shared rendering component embedded in Safari, WKWebView-based apps, and WebKitGTK on Linux. The CPE data confirms affected OS platforms as 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 with versions prior to 26.5. Red Hat errata references (RHSA-2026:25918, 25927, 27728, 27785, 27804, 28114, 28146) indicate the same underlying memory bug reaches WebKitGTK packages on RHEL, broadening the scope beyond Apple-native deployments.

RemediationAI

The primary fix is to upgrade to the patched Apple OS releases: iOS 26.5, iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5, available via Settings > General > Software Update on each respective platform. Advisory details are at https://support.apple.com/en-us/127110 (iOS/iPadOS), https://support.apple.com/en-us/127115 (macOS), and the remaining Apple support pages in the references. For RHEL environments, apply the WebKitGTK updates documented in the Red Hat errata listed above via 'dnf update webkit2gtk4.1' or the applicable package name. Where immediate patching is not possible, restricting use of WebKit-based browsers or disabling automatic link-following in managed environments reduces exposure, though this carries significant usability trade-offs. There is no vendor-documented workaround that fully mitigates the crash without patching.

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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-2026-28901 vulnerability details – vuln.today
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