High
Prototype Pollution in merge-deep
Versions of merge-deep before 3.0.1 are vulnerable to prototype pollution via merging functions.
Recommendation
Update to version 3.0.1 or later.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | merge-deep | < 3.0.1 | 3.0.1 |
References
CVSS score
8.8/10
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-471- Platform
- npm
- Package
merge-deep- Disclosed
- 26.07.2018
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-9g9w-hmvj-5h57 - CC BY 4.0
Vulnerability history: merge-deep
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 07.2018 06.2021
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 1
Disclosures per year
- 2018: 1
- 2019: 0
- 2020: 0
- 2021: 1
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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Prototype Pollution in merge-deep this entry
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