CVE-2026-42353
Path traversal / SSRF in i18next-http-middleware via user-controlled language and namespace parameters
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 8.2EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
08 May 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Affected products
i18next · i18next-http-middlewareWant to know if your infrastructure is exposed to this?
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