Prototype Pollution in js-data

CRITICAL 9.8CVE-2020-28442 · GHSA-mqgv-67vx-g4m5 · Published 15/12/2020 · updated 17/06/2026

In short

CVE-2020-28442 is a CRITICAL (CVSS 9.8) vulnerability affecting js-data.
Chance of exploitation in the next 30 days (EPSS): 2.0%, higher than 80.7% of all vulnerabilities.
Fix: update to 3.0.10 or later.

Package	Affected versions	Patched versions
js-data npm	`< 3.0.10`	`3.0.10`

All versions of package js-data prior to 3.0.10 are vulnerable to Prototype Pollution via the deepFillIn function.

NVD description

All versions of package js-data are vulnerable to Prototype Pollution via the deepFillIn function.

Running one of these products? Scan your site to see whether it exposes a vulnerable version.