CVE-2026-43660

WebKit

High

CVSS Details

CVSS Score

7.5 HIGH

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness

CWE-693 Protection Mechanism Failure

Description

A validation issue was addressed with improved logic. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, 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 prevent Content Security Policy from being enforced. This vulnerability had been resident in the WebKit codebase for thirteen years before being discovered by Cantina's autonomous AppSec agent, Apex.

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Timeline

Discovered

April 2026

Vendor Notified

April 2026

Patch Released

May 12, 2026 (iOS 26.5)

Public Disclosure

May 12, 2026