Prototype pollution in nested-object-assign

HIGH 7.5CVE-2021-23329 · GHSA-c497-v8pv-ch6x · SNYK-JS-NESTEDOBJECTASSIGN-1065977 · Published 31/01/2021 · updated 17/06/2026

In short

CVE-2021-23329 is a HIGH (CVSS 7.5) vulnerability affecting nested-object-assign (getadigital), nested-object-assign.
Chance of exploitation in the next 30 days (EPSS): 1.5%, higher than 75.0% of all vulnerabilities.
Fix: update to 1.0.4 or later.

Package	Affected versions	Patched versions
nested-object-assign getadigital	`< 1.0.4`	`1.0.4`
nested-object-assign npm	`< 1.0.4`	`1.0.4`

Description

The package nested-object-assign before 1.0.4 is vulnerable to Prototype Pollution via the default function.

NVD description

The package nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below.

References

nvd.nist.gov/vuln/detail/CVE-2021-23329 · ADVISORY
Geta/NestedObjectAssign#11 · WEB
snyk.io/vuln/SNYK-JS-NESTEDOBJECTASSIGN-1065977 · WEB
npmjs.com/package/nested-object-assign · WEB

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