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.
Published: 2026-09-10
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 11 Sep 2026 12:30:00 +0000

Type Values Removed Values Added
First Time appeared Mruby
Mruby mruby
Vendors & Products Mruby
Mruby mruby

Fri, 11 Sep 2026 06:45:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference in Prism Parser of mruby 4.0.0
Weaknesses CWE-476

Fri, 11 Sep 2026 05:15:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference in Prism Parser of mruby 4.0.0
Weaknesses CWE-476

Fri, 11 Sep 2026 02:15:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference in Prism Parser of mruby 4.0.0
Weaknesses CWE-476

Thu, 10 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
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.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-14T17:16:15.462Z

Reserved: 2026-08-25T00:00:00.000Z

Link: CVE-2026-79590

cve-icon Vulnrichment

Updated: 2026-09-14T17:15:38.023Z

cve-icon NVD

Status : Received

Published: 2026-09-10T22:17:00.267

Modified: 2026-09-14T18:20:08.437

Link: CVE-2026-79590

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-11T12:15:07Z

Weaknesses