CVE-2026-79590CWE-476

CVE-2026-79590

Medium · published September 11, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
29.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00367 · 29.4th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-09-11T02:17Z
References (3)
https://github.com/mruby/mruby/issues/7032 · [email protected]https://github.com/takumin/mruby/commit/c6866eed4ad5640b552ba79d16063e7ec70a0ac9 · [email protected]https://github.com/mruby/mruby/issues/7032 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 12 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 10 SEP 00:00Z
    A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0
    cvelistv5