CVE-2021-23574: Js-Data

Critical severity, CVSS 9.8. EPSS: 2.1% chance of exploitation in the next 30 days.

All versions of package js-data are vulnerable to Prototype Pollution via the deepFillIn and the set functions. This is an incomplete fix of [CVE-2020-28442](https://snyk.io/vuln/SNYK-JS-JSDATA-1023655).

Affected products

• Js-Data Js-Data: before 3.0.11 (fixed in 3.0.11)

Published 2021-12-24. Last modified 2026-06-17.