CVE-2015-5860: Apple iPhone OS

Medium severity, CVSS 5.0. EPSS: 1.8% chance of exploitation in the next 30 days.

The CFNetwork HTTPProtocol component in Apple iOS before 9 mishandles HSTS state, which allows remote attackers to bypass the Safari private-browsing protection mechanism and track users via a crafted web site.

Affected products

• Apple iPhone OS: up to and including 8.4.1
• Apple watchOS: version 1.0 only

Published 2015-09-18. Last modified 2026-06-17.