# Mruby vulnerabilities

Source: https://junglewise.ai/threats/technologies/mruby  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/mruby.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Mruby: 0 in the last 7 days and 2 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-79590, was published on 10 September 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 2
- All time: 4 (0 critical, 0 exploited in the wild)

## About Mruby

Lightweight embedded Ruby interpreter implementation designed for embedded systems and applications.

## Latest Mruby vulnerabilities

- [CVE-2026-79590: mruby NULL pointer dereference in Prism parser](https://junglewise.ai/threats/cve-2026-79590-mruby-null-pointer-dereference-in-prism-parser) (medium, CVSS 6.5, published 10 Sep 2026)
- [CVE-2022-4996: mruby floating point comparison flaw in bigint division](https://junglewise.ai/threats/cve-2022-4996-mruby-floating-point-comparison-flaw-in-bigint-division) (medium, CVSS 5.3, published 20 Aug 2026)
- [CVE-2025-13120: A vulnerability has been found in mruby up to 3.4.0. This vulnerability affects the function sort_cmp of the file…](https://junglewise.ai/threats/cve-2025-13120-a-vulnerability-has-been-found-in-mruby-up-to-3-4-0-this) (medium, CVSS 5.3, published 13 Nov 2025)
- [CVE-2025-12875: A weakness has been identified in mruby 3.4.0. This vulnerability affects the function ary_fill_exec of the file…](https://junglewise.ai/threats/cve-2025-12875-a-weakness-has-been-identified-in-mruby-3-4-0-this-vulnerability) (medium, CVSS 5.3, published 7 Nov 2025)

## Most severe Mruby vulnerabilities

- [CVE-2026-79590: mruby NULL pointer dereference in Prism parser](https://junglewise.ai/threats/cve-2026-79590-mruby-null-pointer-dereference-in-prism-parser) (medium, CVSS 6.5, published 10 Sep 2026)
- [CVE-2022-4996: mruby floating point comparison flaw in bigint division](https://junglewise.ai/threats/cve-2022-4996-mruby-floating-point-comparison-flaw-in-bigint-division) (medium, CVSS 5.3, published 20 Aug 2026)
- [CVE-2025-12875: A weakness has been identified in mruby 3.4.0. This vulnerability affects the function ary_fill_exec of the file…](https://junglewise.ai/threats/cve-2025-12875-a-weakness-has-been-identified-in-mruby-3-4-0-this-vulnerability) (medium, CVSS 5.3, published 7 Nov 2025)
- [CVE-2025-13120: A vulnerability has been found in mruby up to 3.4.0. This vulnerability affects the function sort_cmp of the file…](https://junglewise.ai/threats/cve-2025-13120-a-vulnerability-has-been-found-in-mruby-up-to-3-4-0-this) (medium, CVSS 5.3, published 13 Nov 2025)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 1 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 1 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Mruby vulnerabilities", https://junglewise.ai/threats/technologies/mruby, 9 November 2026.