CVE-2021-4110: Mruby

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

mruby is vulnerable to NULL Pointer Dereference

Affected products

• Mruby Mruby: before 3.1 (fixed in 3.1)

Published 2021-12-15. Last modified 2026-06-17.