{"cve":"CVE-2020-7774","nvd":{"published":"2020-11-17T13:15:12.633","modified":"2026-06-17T03:25:25.397","status":"Modified","description":"The package y18n before 3.2.2, 4.0.1 and 5.0.5, is vulnerable to Prototype Pollution.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-1321"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf","https://github.com/yargs/y18n/issues/96","https://github.com/yargs/y18n/pull/108","https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1038306","https://snyk.io/vuln/SNYK-JS-Y18N-1021887"],"products":["oracle:graalvm","siemens:sinec_infrastructure_network_services","y18n_project:y18n"],"source":"nvd","synced_at":"2026-10-19T21:11:20.317016139+00:00"},"epss":{"cve":"CVE-2020-7774","score":0.69589,"percentile":0.99365,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-c4w7-xm78-47vh","url":"https://osv.dev/vulnerability/GHSA-c4w7-xm78-47vh","summary":"Prototype Pollution in y18n","modified":"2024-12-05T15:28:53.812442Z","packages":[{"ecosystem":"npm","name":"y18n","purl":"pkg:npm/y18n","ranges":["<3.2.2"],"fixed":["3.2.2"]},{"ecosystem":"npm","name":"y18n","purl":"pkg:npm/y18n","ranges":[">=4.0.0 <4.0.1"],"fixed":["4.0.1"]},{"ecosystem":"npm","name":"y18n","purl":"pkg:npm/y18n","ranges":[">=5.0.0 <5.0.5"],"fixed":["5.0.5"]}]}],"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."]}