{"cve":"CVE-2022-21803","nvd":{"published":"2022-04-12T16:15:08.480","modified":"2026-06-17T04:27:00.927","status":"Modified","description":"This affects the package nconf before 0.11.4. When using the memory engine, it is possible to store a nested JSON representation of the configuration. The .set() function, that is responsible for setting the configuration properties, is vulnerable to Prototype Pollution. By providing a crafted property, it is possible to modify the properties on the Object.prototype.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-1321"],"references":["https://github.com/indexzero/nconf/pull/397","https://github.com/indexzero/nconf/releases/tag/v0.11.4","https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2632450","https://snyk.io/vuln/SNYK-JS-NCONF-2395478","https://github.com/indexzero/nconf/pull/397"],"products":["nconf_project:nconf"],"source":"nvd","synced_at":"2026-10-19T21:30:03.577988018+00:00"},"epss":{"cve":"CVE-2022-21803","score":0.0178,"percentile":0.78251,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-6xwr-q98w-rvg7","url":"https://osv.dev/vulnerability/GHSA-6xwr-q98w-rvg7","summary":"Prototype Pollution in nconf","modified":"2024-05-19T02:24:17.311015Z","packages":[{"ecosystem":"npm","name":"nconf","purl":"pkg:npm/nconf","ranges":["<0.11.4"],"fixed":["0.11.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}