CVE-2021-30969: Apple Mac OS X

High severity, CVSS 7.8. EPSS: 1.1% chance of exploitation in the next 30 days.

A path handling issue was addressed with improved validation. This issue is fixed in Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. Processing a maliciously crafted URL may cause unexpected JavaScript execution from a file on disk.

Affected products

• Apple Mac OS X: from 10.15, up to and including 10.15.7; version 10.15.7 only
• Apple macOS: from 11.0, before 11.6.2 (fixed in 11.6.2)

Published 2021-08-24. Last modified 2026-06-17.