CVE-2018-16486
Prototype Pollution in defaults-deep
A prototype pollution vulnerability was found in defaults-deep <=0.2.4 that would allow a malicious user to inject properties onto Object.prototype.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A prototype pollution vulnerability was found in defaults-deep <=0.2.4 that would allow a malicious user to inject properties onto Object.prototype.
- Record
CVE-2018-16486- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-400, CWE-74
- Updated
- 2026-11-02
CVE List No score
A prototype pollution vulnerability was found in defaults-deep <=0.2.4 that would allow a malicious user to inject properties onto Object.prototype.
- Record
CVE-2018-16486- Weakness
- CWE-400
- Updated
- 2026-11-02
EUVDEUVD-2019-0323 No score
A prototype pollution vulnerability was found in defaults-deep <=0.2.4 that would allow a malicious user to inject properties onto Object.prototype.
- Record
EUVD-2019-0323- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-pjxw-22xf-6pwc
Prototype Pollution in defaults-deep
All versions of defaults-deep are vulnerable to prototype pollution. Provided certain input defaults-deep can add or modify properties of the Object prototype. These properties will be present on all objects.
Recommendation
As no patch is currently available for this vulnerability it is our recommendation to select another module that can provide this functionality.
- Record
GHSA-pjxw-22xf-6pwc- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-345, CWE-400
- Updated
- 2026-11-02
OSVGHSA-pjxw-22xf-6pwc
Prototype Pollution in defaults-deep
All versions of defaults-deep are vulnerable to prototype pollution. Provided certain input defaults-deep can add or modify properties of the Object prototype. These properties will be present on all objects.
Recommendation
As no patch is currently available for this vulnerability it is our recommendation to select another module that can provide this functionality.
- Record
GHSA-pjxw-22xf-6pwc- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-345, CWE-400
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
defaults-deepnpm |
through 0.2.4 | None known |
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-2018-16486 is a critical vulnerability (CVSS 9.8) in Defaults-deep Project Defaults-deep, published February 1, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.48%, the 74th percentile. No source names a fixed version.