CVE-2018-4281: Apple Swiftnio

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

In SwiftNIO before 1.8.0, a buffer overflow was addressed with improved size validation.

Affected products

• Apple Swiftnio: before 1.8.0 (fixed in 1.8.0)

Published 2019-01-11. Last modified 2026-06-17.