CVE-2026-43746 is a use-after-free vulnerability in Safari and related Apple operating systems that was addressed by improved memory management. The flaw could cause Safari to crash unexpectedly when processing maliciously crafted web content. The issue is fixed in Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2. The vulnerability has a medium severity rating with a CVSS score of 6.5.