Prototype Pollution

published 2022-05-01 4 y ago modified 2026-06-17 4 mo ago also GHSA-23wx-cgxq-vpwx , EUVD-2022-1897

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 79%
public exploits: 0; none known

All versions of package dset are vulnerable to Prototype Pollution via 'dset/merge' mode, as the dset function checks for prototype pollution by validating if the top-level path contains __proto__, constructor or protorype. By crafting a malicious object, it is possible to bypass this check and achieve prototype pollution.

Patch / fix

fixed in 2 links 1

npm dset 3.1.2
maven org.webjars.npm:dset 3.1.2

github.com/lukeed/dset#38 pull request

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-25645 updated 2026-01-22 cvss 6.5

dset: Prototype Pollution in dset

Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/search-ui-rhel8
affected: no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.84% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

snyk.io https://snyk.io/vuln/SNYK-JS-DSET-2330881 referenced PoC, tagged "exploit" by a source, unverified
snyk.io https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2431974 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L/E:P
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L
NVD	3.1	8.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub	3.1	6.5	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L

Affected packages

ecosystem	package	affected	fixed in
npm	dset	<3.1.2	3.1.2
maven	org.webjars.npm:dset	<3.1.2	3.1.2

Affected products

n/a dset

Classification

Weakness

CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

References

github.com /lukeed/dset/pull/38
snyk.io /vuln/SNYK-JS-DSET-2330881
web, exploit, third-party-advisory
snyk.io /vuln/SNYK-JAVA-ORGWEBJARSNPM-2431974
web, exploit, third-party-advisory
github.com /lukeed/dset/blob/master/src/merge.js%23L9
web, broken-link
nvd.nist.gov /vuln/detail/CVE-2022-25645
advisory
github.com /lukeed/dset
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary