CVE-2018-3722
CVSS v3
8.8
HIGH
EPSS Score
2.0 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
merge-deep node module before 3.0.1 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability, which allows a malicious user to modify the prototype of "Object" via __proto__, causing the addition or modification of an existing property that will exist on all objects.
Technical details
- Published
- 2018-06-07
Frequently asked questions
What is CVE-2018-3722?
merge-deep node module before 3.0.1 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability, which allows a malicious user to modify the prototype of "Object" via __proto__, causing the addition or modification of an existing property that will exist on all objects.
Is CVE-2018-3722 actively exploited?
Active exploitation of CVE-2018-3722 has not been confirmed. Its EPSS score was 2.0% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2018-3722?
CVE-2018-3722 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2018-3722 affecting your environment?
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