CVE-2023-28204: Apple Multiple Products WebKit Out-of-Bounds Read Vulnerability

Medium severity, CVSS 6.5. Actively exploited: in CISA KEV since 2023-05-22. EPSS: 14.3% chance of exploitation in the next 30 days.

An out-of-bounds read was addressed with improved input validation. This issue is fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, iOS 15.7.6 and iPadOS 15.7.6, Safari 16.5, iOS 16.5 and iPadOS 16.5. Processing web content may disclose sensitive information. Apple is aware of a report that this issue may have been actively exploited.

Affected products

• Apple iPadOS: before 15.7.6 (fixed in 15.7.6); from 16.0, before 16.5 (fixed in 16.5)
• Apple iPhone OS: before 15.7.6 (fixed in 15.7.6); from 16.0, before 16.5 (fixed in 16.5)
• Apple macOS: from 13.0, before 13.4 (fixed in 13.4)
• Apple Safari: before 16.5 (fixed in 16.5)
• Apple tvOS: before 16.5 (fixed in 16.5)
• Apple watchOS: before 9.5 (fixed in 9.5)
• WebKitGTK Webkitgtk+: before 2.42.3 (fixed in 2.42.3)

Published 2023-06-23. Last modified 2026-06-17.