Safari 26.6: iframe sandbox validation flaw
CVE-2026-64728 Published on July 27, 2026
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.
Vulnerability Analysis
CVE-2026-64728 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, a high impact on integrity, and no impact on availability.
Weakness Type
Protection Mechanism Failure
The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. This weakness covers three distinct situations. A "missing" protection mechanism occurs when the application does not define any mechanism against a certain class of attack. An "insufficient" protection mechanism might provide some defenses - for example, against the most common attacks - but it does not protect against everything that is intended. Finally, an "ignored" mechanism occurs when a mechanism is available and in active use within the product, but the developer has not applied it in some code path.
Products Associated with CVE-2026-64728
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Affected Versions
Apple Safari:- Before 26.6 is affected.
- Before 26.6 is affected.
- Before 26.6 is affected.
- Before 26.6 is affected.
- Before 26.6 is affected.
- Before 26.6 is affected.