{"cve":"CVE-2026-118258","nvd":{"published":"2026-10-28T19:17:30.360","modified":"2026-10-28T19:17:30.360","status":"Received","description":"i18next-http-backend is a backend layer for i18next that loads translation resources in Node.js, browsers, and Deno. Prior to 4.0.4, interpolateUrl inserts unencoded language and namespace values into loadPath or addPath templates without rejecting ampersand (&), equals (=), or semicolon (;) query separators. When a template places lng or ns in the query string and an attacker controls that value, the attacker can add or override parameters on browser or server-side translation requests, potentially exposing other namespaces or tenants or changing backend behavior through the application's network position and credentials. This vulnerability is the result of an incomplete fix for CVE-2026-41691. This issue is fixed in version 4.0.4.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","score":3.7},"cwes":["CWE-74"],"references":["https://github.com/i18next/i18next-http-backend/commit/b0eef9efd425055c554787cef7f878de33bbf510","https://github.com/i18next/i18next-http-backend/releases/tag/v4.0.4","https://github.com/i18next/i18next-http-backend/security/advisories/GHSA-3cmx-xjww-583x"],"products":[],"source":"nvd","synced_at":"2026-10-28T19:37:43.506563291+00:00"},"epss":null,"kev":null,"osv":[{"id":"GHSA-3cmx-xjww-583x","url":"https://osv.dev/vulnerability/GHSA-3cmx-xjww-583x","summary":"i18next-http-backend: Query-parameter injection through & and = in lng when loadPath/addPath puts {{lng}} in the query string","modified":"2026-10-28T21:30:03.892370163Z","packages":[{"ecosystem":"npm","name":"i18next-http-backend","purl":"pkg:npm/i18next-http-backend","ranges":["<4.0.4"],"fixed":["4.0.4"]}]}],"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."]}