CVE-2021-40663: Deep.assign Project Deep.assign

Critical severity, CVSS 9.8. EPSS: 1.8% chance of exploitation in the next 30 days.

deep.assign npm package 0.0.0-alpha.0 is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').

Affected products

• Deep.assign Project Deep.assign: version 0.0.0 only

Published 2022-06-30. Last modified 2026-06-17.