CVE-2026-48714

The CVE-2026-48714 issue affects i18next-http-middleware prior to 3.9.7. The missingKeyHandler can accept request-body keys like proto , constructor, and prototype (and similar dotted variants) and, when downstream backends such as i18next-fs-backend ≤ 2.6.5 split on keySeparator, passes them to ...

GHSA-5FGG-JCPF-8JJW i18next-http-middleware: Prototype pollution and path traversal via user-controlled language and namespace parameters

Summary Versions of i18next-http-middleware prior to 3.9.3 pass user-controlled lng and ns parameters to two internal paths that use them in ways that enable prototype pollution and, depending on the configured backend, path traversal or SSRF. The vulnerable entry points are unauthenticated HTTP...