CVE-2026-64728

webkitgtk: Maliciously crafted web content may violate iframe sandboxing policy

Published Jul 27, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
A permissions issue was addressed with improved validation. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. Maliciously crafted web content may violate iframe sandboxing policy.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6463-1 webkit2gtk security update
Ubuntu USN Ubuntu USN USN-8703-1 WebKitGTK vulnerabilities
History
Type Values Removed Values Added
Title webkitgtk: Maliciously crafted web content may violate iframe sandboxing policy
References
Metrics threat_severity

None

threat_severity

Moderate

Type Values Removed Values Added
Title Safari and Apple OS iframe sandbox bypass
Weaknesses CWE-285
Type Values Removed Values Added
Title Safari and Apple OS iframe sandbox bypass
Weaknesses CWE-285
CWE-693
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Apple
Apple ios And Ipados
Apple macos
Apple safari
Apple tvos
Apple visionos
Apple watchos
Vendors & Products Apple
Apple ios And Ipados
Apple macos
Apple safari
Apple tvos
Apple visionos
Apple watchos
Type Values Removed Values Added
Description A permissions issue was addressed with improved validation. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. Maliciously crafted web content may violate iframe sandboxing policy.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Jul 28, 2026, 3:10 PM
Reserved
Jul 20, 2026, 6:09 PM
Status
Analyzed
Published
Jul 27, 2026, 9:17 PM
Modified
Jul 28, 2026, 6:55 PM
Severity
Moderate
Public date
Aug 20, 2026, 12:00 AM