PatchTheCVECVE-2018-3723: defaults-deep node module before 0.2.4 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerabil
CVE-2018-3723 is a high-severity flaw (CVSS 8.8) affecting defaults-deep. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
defaults-deep node module before 0.2.4 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.
Why this priority
- High severity
- Public exploit reference
A fixed release or distro patch exists.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2018-3723?
defaults-deep: upgrade to 0.2.4. Exact commands for each OS are on this page.
Is CVE-2018-3723 being exploited?
CVE-2018-3723 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2018-3723 affect?
CVE-2018-3723 affects defaults-deep. Severity is high (CVSS 8.8). defaults-deep node module before 0.2.4 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 e
How urgent is CVE-2018-3723?
Priority 56/100. High severity; Public exploit reference
Related CVEs
- CVE-2018-16486 CRITICAL 9.8 UPGRADE A prototype pollution vulnerability was found in defaults-deep <=0.2.4 that would allow a malicious user to in