CVE-2021-23417
Prototype Pollution
All versions of package deepmergefn are vulnerable to Prototype Pollution via deepMerge function.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Prototype Pollution
All versions of package deepmergefn are vulnerable to Prototype Pollution via deepMerge function.
- Record
CVE-2021-23417- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:U/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-1894
All versions of package deepmergefn are vulnerable to Prototype Pollution via deepMerge function.
- Record
EUVD-2021-1894- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:U/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vj72-mwrj-m2xq
Prototype Pollution in deepmergefn
All versions of package deepmergefn are vulnerable to Prototype Pollution via deepMerge function.
- Record
GHSA-vj72-mwrj-m2xq- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-915, CWE-1321
- Updated
- 2026-11-02
NVD
All versions of package deepmergefn are vulnerable to Prototype Pollution via deepMerge function.
- Record
CVE-2021-23417- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS 3.1
- 9.8 Critical
CVSS:3.1/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-1321
- Updated
- 2026-11-02
OSVGHSA-vj72-mwrj-m2xq
Prototype Pollution in deepmergefn
All versions of package deepmergefn are vulnerable to Prototype Pollution via deepMerge function.
- Record
GHSA-vj72-mwrj-m2xq- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-1321, CWE-915
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
deepmergefnnpm |
through 1.1.0 | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-23417 is a medium vulnerability (CVSS 5.6) in Deepmergefn Project Deepmergefn, published July 28, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.08%, the 65th percentile. No source names a fixed version.