{"id":"CVE-2026-105800","title":"i18next-http-backend is a backend layer for i18next that loads translation resources in Node.js, browsers, and Deno","summary":"i18next-http-backend is a backend layer for i18next that loads translation resources in Node.js, browsers, and Deno. Prior to 4.0.2, attacker-controlled language or namespace values interpolated into a custom loadPath or addPath that beg…","severity":"low","cvss":3.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-74","CWE-918"],"vendor":"i18next-http-backend","product":"i18next-http-backend","affected":["i18next-http-backend < 4.0.2"],"patched":["i18next-http-backend 4.0.2"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T16:08:43.180","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-105800","references":[{"url":"https://github.com/i18next/i18next-http-backend/commit/07e028862b25d0b9251bf3cafb92be2d35285f85","label":"security-advisories@github.com"},{"url":"https://github.com/i18next/i18next-http-backend/releases/tag/v4.0.2","label":"security-advisories@github.com"},{"url":"https://github.com/i18next/i18next-http-backend/security/advisories/GHSA-xvq9-wjp8-hwqf","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105800"},{"url":"https://github.com/advisories/GHSA-xvq9-wjp8-hwqf"}],"tags":["nvd","ghsa","npm","cve.org"],"aliases":["GHSA-xvq9-wjp8-hwqf"],"ecosystem":"npm","ingestedAt":"2026-10-06T15:01:49.297Z","slug":"CVE-2026-105800","body":"## Overview\n\ni18next-http-backend is a backend layer for i18next that loads translation resources in Node.js, browsers, and Deno. Prior to 4.0.2, attacker-controlled language or namespace values interpolated into a custom loadPath or addPath that begins directly with {{lng}} or {{ns}} can make colon-based input become an absolute URL or, in browsers, make a double-slash namespace become a protocol-relative URL. The resulting request can leave the intended origin and cause URL injection or server-side request forgery. The default /locales/{{lng}}/{{ns}}.json template and templates with a leading path or origin are not affected because the placeholder does not occupy the URL's structural beginning. This issue is fixed in version 4.0.2.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-105800)\n\nAffected packages:\n\n- `i18next-http-backend < 4.0.2`\n\nPatched in:\n\n- `i18next-http-backend 4.0.2`\n\nSource: https://github.com/advisories/GHSA-xvq9-wjp8-hwqf","depth":"sunlit","depthScore":20,"depthScoreParts":{"impact":20.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}