CVE-2021-23702
Prototype Pollution
The package object-extend from 0.0.0 are vulnerable to Prototype Pollution via object-extend.
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
- Low
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Prototype Pollution
The package object-extend from 0.0.0 are vulnerable to Prototype Pollution via object-extend.
- Record
CVE-2021-23702- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L/E:P - Updated
- 2026-11-02
EUVDEUVD-2022-1091
The package object-extend from 0.0.0 are vulnerable to Prototype Pollution via object-extend.
- Record
EUVD-2022-1091- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L/E:P - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-m639-9whg-fw97
Prototype Pollution in object-extend
The package object-extend from 0.0.0 through 0.5.0 is vulnerable to Prototype Pollution via object-extend.
- Record
GHSA-m639-9whg-fw97- 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 - Weakness
- CWE-1321
- Updated
- 2026-11-02
NVD
The package object-extend from 0.0.0 are vulnerable to Prototype Pollution via object-extend.
- Record
CVE-2021-23702- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/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-m639-9whg-fw97
Prototype Pollution in object-extend
The package object-extend from 0.0.0 through 0.5.0 is vulnerable to Prototype Pollution via object-extend.
- Record
GHSA-m639-9whg-fw97- 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 - Weakness
- CWE-1321
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
object-extendnpm |
through 0.5.0 | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| 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-2021-23702 is a high vulnerability (CVSS 7.6) in Object-extend Project Object-extend, published February 18, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.38%, the 72nd percentile. No source names a fixed version.