CVE-2026-64788

Maliciously Crafted Web Content Causing Memory Corruption on Apple Devices

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Published Aug 17, 2026 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Description
The issue was addressed with improved memory handling. This issue is fixed in iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, visionOS 27, watchOS 27. Processing maliciously crafted web content may lead to memory corruption.

Analysis

AI-generated

Technical impact

Apple devices exhibit a memory corruption flaw that can be triggered by processing maliciously crafted web content. The issue has been addressed with improved memory handling and is fixed in iOS 26.6.1, iPadOS 26.6.1, macOS Tahoe 26.6.2, visionOS 27, and watchOS 27. Processing such content may lead to memory corruption.

Affected Systems

Apple iOS, iPadOS, macOS, visionOS, and watchOS devices running release versions prior to iOS 26.6.1, iPadOS 26.6.1, macOS Tahoe 26.6.2, affected. Updated releases contain enhanced memory handling that mitigates the flaw.

Risk and Exploitability

The CVSS score of 5.4 indicates moderate severity for a memory corruption flaw. The EPSS score of less than 1% signals a very low probability of exploitation in the wild. The vulnerability is not listed in the CISA KEV catalog. Based on the description, the likely attack vector is the delivery of malicious web content, such as through compromised websites or phishing emails, which may trigger memory corruption when processed by the browser or webview components.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Update iOS to 26.6.1, iPadOS to 26.6.1, or macOS Tahoe to 26.6.2.
  • Configure Safari security settings to block or quarantine suspicious content, such as using content blockers or safe browsing protections.
  • Monitor device logs for memory corruption or crash events to detect attempts.

Generated by OpenCVE AI on September 21, 2026 at 06:58 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Title Maliciously Crafted Web Content Causing Memory Corruption on Apple Devices
Type Values Removed Values Added
Description The issue was addressed with improved memory handling. This issue is fixed in iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously crafted web content may lead to memory corruption. The issue was addressed with improved memory handling. This issue is fixed in iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, visionOS 27, watchOS 27. Processing maliciously crafted web content may lead to memory corruption.
References
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}
Type Values Removed Values Added
Title Memory Corruption in Apple Web Content Handling
Weaknesses CWE-229
Type Values Removed Values Added
First Time appeared Apple ipados
Apple iphone Os
CPEs cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Vendors & Products Apple ipados
Apple iphone Os
Type Values Removed Values Added
Weaknesses CWE-119
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}
Type Values Removed Values Added
Title Memory Corruption in Apple Web Content Handling
Weaknesses CWE-229
Type Values Removed Values Added
First Time appeared Apple
Apple ios And Ipados
Apple macos
Vendors & Products Apple
Apple ios And Ipados
Apple macos
Type Values Removed Values Added
Description The issue was addressed with improved memory handling. This issue is fixed in iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously crafted web content may lead to memory corruption.
References
Earlier changes (4)
Weaknesses
  • CWE-119

    Improper Restriction of Operations within the Bounds of a Memory Buffer

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Oct 26, 2026, 8:39 PM
Reserved
Jul 20, 2026, 6:11 PM

View source JSON

Updated
Aug 18, 2026, 1:35 PM

JSON

Status
Modified
Published
Aug 17, 2026, 10:17 PM
Modified
Sep 14, 2026, 9:17 PM

View source JSON

No data.

Updated
Sep 21, 2026, 7:00 AM

JSON