CVE-2026-42353 — Path traversal / SSRF in i18next-http-middleware via user-controlled language and namespace parameters
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 passes …
Published: 2026-05-08 · CVSS: 8.2 · CVSS 3.1
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 passes the user-controlled lng and ns values from getResourcesHandler directly into i18next.services.backendConnector.load(languages, namespaces, …) without any sanitization. Depending on which backend is configured, the unvalidated path segments enable either path traversal or SSRF. This issue has been patched in version 3.9.3.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7