npm immer

Name: npm immer
Brand: npm

productUS

pkg:npm/immer

A product tracked in the threat graph; the vulnerabilities below are known to affect it.

KEV-listed

public exploit

EPSS ≥ 10%

unpatched

by severity

2critical0high1medium0low

updated 2026-10-28

vulnerabilities (3)

Related CVEs.

sort

ID	severity	EPSS	exploitable	patched	published	affected
CVE-2020-28477US	medium5.0	2.34% (84th)	—	8.0.1	2021-01-19	7.0.0 → 8.0.1
CVE-2021-23436US	critical9.8	1.80% (78th)	—	9.0.6	2021-09-01	7.0.0 → 9.0.6
CVE-2021-3757US	critical9.8	1.66% (77th)	—	9.0.6	2021-09-02	7.0.0 → 9.0.6

The flaw types (CWEs) most of these CVEs share.

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')3 CVEs
CWE-915Improperly Controlled Modification of Dynamically-Determined Object Attributes2 CVEs
CWE-471Modification of Assumed-Immutable Data (MAID)1 CVEs
CWE-843Access of Resource Using Incompatible Type ('Type Confusion')1 CVEs

Which sources assert this record, and when.

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