CVE-2026-41683— HTTP response splitting and DoS in i18next-http-middleware via unsanitised Content-Language header

HTTP response splitting and DoS in i18next-http-middleware via unsanitised Content-Language header

i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Prior to version 3.9.3, i18next-http-middleware wrote user-controlled language values into the Content-Language response header after passing them through utils.escape(), which is an HTML-entity encoder that does not strip carriage return, line feed, or other control characters. When the application used an older i18next (< 19.5.0) that still exercised the backward-compatibility fallback at LanguageDetector.js:100 or otherwise produced a raw detected value, CRLF sequences in the attacker-controlled lng parameter reached res.setHeader('Content-Language', ...) verbatim. This issue has been patched in version 3.9.3.

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

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

i18next-http-middleware 跨站脚本漏洞

i18next-http-middleware是i18next开源的一个用于Node.js和Deno的HTTP国际化中间件。 i18next-http-middleware 3.9.3之前版本存在跨站脚本漏洞，该漏洞源于将用户控制的语言值写入Content-Language响应标头时未正确清理回车、换行等控制字符，可能导致CRLF注入。

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