CVE-2018-12249
CVSS v3
7.5
HIGH
EPSS Score
2.1 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real because "class BasicObject" is not properly supported in class.c.
Technical details
- Published
- 2018-06-12
Frequently asked questions
What is CVE-2018-12249?
An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real because "class BasicObject" is not properly supported in class.c.
Is CVE-2018-12249 actively exploited?
Active exploitation of CVE-2018-12249 has not been confirmed. Its EPSS score was 2.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2018-12249?
CVE-2018-12249 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2018-12249 affecting your environment?
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