CVE-2025-43529: Apple Multiple Products Use-After-Free WebKit Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2025-12-15. EPSS: 8.8% chance of exploitation in the next 30 days.

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 was also issued in response to this report.

Affected products

• Apple iPadOS: before 18.7.3 (fixed in 18.7.3); from 26.0, before 26.2 (fixed in 26.2)
• Apple iPhone OS: before 18.7.3 (fixed in 18.7.3); from 26.0, before 26.2 (fixed in 26.2)
• Apple macOS: from 26.0, before 26.2 (fixed in 26.2)
• Apple Safari: before 26.2 (fixed in 26.2)
• Apple tvOS: before 26.2 (fixed in 26.2)
• Apple visionOS: before 26.2 (fixed in 26.2)
• Apple watchOS: before 26.2 (fixed in 26.2)

Published 2025-12-17. Last modified 2026-10-07.