{"cve":"CVE-2025-3197","nvd":{"published":"2025-04-04T05:15:46.103","modified":"2026-06-17T09:19:24.277","status":"Deferred","description":"Versions of the package expand-object from 0.0.0 are vulnerable to Prototype Pollution in the expand() function in index.js. This function expands the given string into an object and allows a nested property to be set without checking the provided keys for sensitive properties like __proto__.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","score":5.5},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","score":7.3},"cwes":["CWE-1321"],"references":["https://gist.github.com/miguelafmonteiro/d8f66af61d14e06338b688f90c4dfa7c","https://github.com/jonschlinkert/expand-object/blob/master/index.js%23L13","https://security.snyk.io/vuln/SNYK-JS-EXPANDOBJECT-5821390","https://security.snyk.io/vuln/SNYK-JS-EXPANDOBJECT-5821390"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:00:57.946988208+00:00"},"epss":{"cve":"CVE-2025-3197","score":0.00423,"percentile":0.36651,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-4vjr-hfpp-2m7w","url":"https://osv.dev/vulnerability/GHSA-4vjr-hfpp-2m7w","summary":"expand-object Vulnerable to Prototype Pollution via the expand() Function","modified":"2025-04-04T19:27:20.379263Z","packages":[{"ecosystem":"npm","name":"expand-object","purl":"pkg:npm/expand-object","ranges":["<=0.4.2"],"fixed":[]}]}],"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."]}