CVE-2026-41691— i18next-http-backend has Path Traversal & URL Injection via Unsanitised lng/ns

i18next-http-backend has Path Traversal & URL Injection via Unsanitised lng/ns

Copilot said: i18nextify is a JavaScript library that adds i18nextify is a JavaScript library that adds website internationalization via a script tag, without source code changes. Versions prior to 3.0.5 interpolate the lng and ns values directly into the configured loadPath / addPath URL template without any encoding, validation, or path sanitisation. When an application exposes the language-code selection to user-controlled input (the default — i18next-browser-languagedetector reads ?lng= query params, cookies, localStorage, and request headers), an attacker can inject characters that change the structure of the outgoing request URL. This is a single URL-injection vulnerability. The attacker-controlled value is neutralised before it is used as part of an output URL string; the attack shape covers both path traversal and broader URL-structure injection — both are closed by the one interpolateUrl sanitisation fix. This issue has been fixed in version 3.0.5. If users cannot upgrade immediately, they can work around the issue by sanitising lng / ns before they reach i18next (strip .., /, \, ?, #, %, whitespace, and control characters; cap the length).

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

对路径名的限制不恰当(路径遍历)

i18next-http-backend 路径遍历漏洞

i18next-http-backend是i18next开源的一个跨平台的后端资源加载工具。 i18next-http-backend 3.0.5之前版本存在路径遍历漏洞，该漏洞源于将lng和ns值直接插入URL模板而未进行编码、验证或路径清理，可能导致URL注入。

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