CVE-2026-42353
HIGHPath traversal / SSRF in i18next-http-middleware via user-controlled language and namespace parameters
Title source: cnaDescription
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.
References (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/i18next/i18next-http-middleware/security/advisories/GHSA-jfgf-83c5-2c4m
Scores
CVSS v3
8.2
EPSS
0.0002
EPSS Percentile
5.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-22
CWE-918
Status
published
Products (2)
i18next/i18next-http-middleware
< 3.9.3
npm/i18next-http-middleware
0 - 3.9.3npm
Published
May 08, 2026
Tracked Since
May 08, 2026