CVE-2026-42353
Path traversal / SSRF in i18next-http-middleware via user-controlled language and namespace parameters
CVSS Score
8.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-22 CWE-918 |
| Vendor | i18next |
| Product | i18next-http-middleware |
| Published | May 8, 2026 |
| Last Updated | May 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
Affected Versions
i18next / i18next-http-middleware
< 3.9.3