CVE-2019-8840: Apple Xcode

High severity, CVSS 8.8. EPSS: 1.3% chance of exploitation in the next 30 days.

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in Xcode 11.3. Compiling with untrusted sources may lead to arbitrary code execution with user privileges.

Affected products

• Apple Xcode: before 11.3 (fixed in 11.3)

Published 2020-10-27. Last modified 2026-06-17.