CVE-2018-3723
Prototype Pollution in defaults-deep
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2018-3723- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-471, CWE-20
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2018-3723- Weakness
- CWE-471
- Updated
- 2026-11-02
EUVDEUVD-2018-0261 No score
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.
- Record
EUVD-2018-0261- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-cqp5-m4pq-gfgp
Prototype Pollution in defaults-deep
Versions of default-deep before 0.2.4 are vulnerable to prototype pollution
Recommendation
Update to version 0.2.4 or later.
- Record
GHSA-cqp5-m4pq-gfgp- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-471
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2018-3723- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-cqp5-m4pq-gfgp
Prototype Pollution in defaults-deep
Versions of default-deep before 0.2.4 are vulnerable to prototype pollution
Recommendation
Update to version 0.2.4 or later.
- Record
GHSA-cqp5-m4pq-gfgp- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-471
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
defaults-deepnpm |
before 0.2.4 | 0.2.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-3723 is a high vulnerability (CVSS 8.8) in Defaults-deep Project Defaults-deep, published June 7, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.00%, the 80th percentile. Fixed in defaults-deep 0.2.4.