Is CVE-2026-79590 being exploited?

No public exploit is currently tracked.

Back

CVE-2026-79590

Description

A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0. An attacker can provide a specially crafted Ruby source file that triggers the parser to pass a NULL pointer to nonnull string handling functions, resulting in undefined behavior and application crash.