CVE-2026-28907

WebKit

High

CVSS Details

CVSS Score

8.1 HIGH

Vector String

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

Weakness

CWE-20 Improper Input Validation

Description

The issue was addressed with improved input validation. This issue is fixed in Safari 26.5, 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 is a Content Security Policy bypass vulnerability in WebKit's policy enforcement layer.

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Timeline

Discovered

April 2026

Vendor Notified

April 2026

Patch Released

May 11, 2026 (iOS 26.5)

Public Disclosure

May 11, 2026