CVE-2020-28442
Prototype Pollution
CVE-2020-28442 is a high vulnerability (CVSS 7.5) in Js-data, published December 15, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.98%, the 80th percentile. Fixed in js-data 3.0.10.
All versions of package js-data are vulnerable to Prototype Pollution via the deepFillIn function.
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
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Prototype Pollution
All versions of package js-data are vulnerable to Prototype Pollution via the deepFillIn function.
- Record
CVE-2020-28442- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
EUVDEUVD-2022-1107
All versions of package js-data are vulnerable to Prototype Pollution via the deepFillIn function.
- Record
EUVD-2022-1107- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-mqgv-67vx-g4m5
Prototype Pollution in js-data
All versions of package js-data prior to 3.0.10 are vulnerable to Prototype Pollution via the deepFillIn function.
- Record
GHSA-mqgv-67vx-g4m5- 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
All versions of package js-data are vulnerable to Prototype Pollution via the deepFillIn function.
- Record
CVE-2020-28442- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - 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 - Updated
- 2026-11-02
OSVGHSA-mqgv-67vx-g4m5
Prototype Pollution in js-data
All versions of package js-data prior to 3.0.10 are vulnerable to Prototype Pollution via the deepFillIn function.
- Record
GHSA-mqgv-67vx-g4m5- 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 |
|---|---|---|
js-datanpm |
before 3.0.10 | 3.0.10 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases, published | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
snyk.io/vuln/SNYK-JS-JSDATA-1023655
github.com/js-data/js-data/blob/master/src/utils.js%23L417
nvd.nist.gov/vuln/detail/CVE-2020-28442