What is CVE-2022-1427?

CVE-2022-1427 is a high-severity vulnerability in Mruby, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2022-04-23.

How severe is CVE-2022-1427?

High severity. CVSS v3 base score is 7.8 out of 10.

Out-of-bounds Read in Mruby

CVE-2022-1427

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

Vulnerability class: Buffer Overflow

Published 2022-04-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (38.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000

Affected products

Mruby
Mruby Mruby/mruby — versions unspecified

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

huntr.dev/bounties/23b6f0a9-64f5-421e-a55f-b5b7a671f301 (Exploit, Third Party Advisory)
github.com/mruby/mruby/commit/a4d97934d51cb88954cc49161dc1d151f64afb6b (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-1427?: CVE-2022-1427 is a high-severity vulnerability in Mruby, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2022-04-23.
How severe is CVE-2022-1427?: High severity. CVSS v3 base score is 7.8 out of 10.