CVE-2023-27938: Apple macOS

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

An out-of-bounds read issue was addressed with improved input validation. This issue is fixed in GarageBand for macOS 10.4.8. Parsing a maliciously crafted MIDI file may lead to an unexpected application termination or arbitrary code execution.

Affected products

• Apple macOS: before 10.4.8 (fixed in 10.4.8)

Published 2023-05-08. Last modified 2026-06-17.