CVE-2026-48714

i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. In versions prior to 3.9.7, the missingKeyHandler blocked the literal request-body keys proto, constructor, and prototype added in 3.9.3, see GHSA-5fgg-jcpf-8jjw, but did not...

CVE-2026-48714 i18next-http-middleware missingKeyHandler does not reject keys whose segments contain prototype-polluting names

i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. In versions prior to 3.9.7, the missingKeyHandler blocked the literal request-body keys proto, constructor, and prototype added in 3.9.3, see GHSA-5fgg-jcpf-8jjw, but did not...

PT-2026-49529

Name of the Vulnerable Software and Affected Versions i18next-http-middleware versions prior to 3.9.7 i18next-fs-backend versions 2.6.5 and earlier Description The missingKeyHandler in i18next-http-middleware fails to reject dotted variants of restricted keys, such as proto .polluted, while only...

CVE-2026-41690

18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Versions prior to 3.9.3 allow an unauthenticated HTTP client to pollute Object.prototype in the Node.js process hosting the middleware, via two unvalidated entry points that...