EUVD-2026-37005

i18next-fs-backend vulnerable to prototype pollution via crafted missing-key string...

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-2026-42353

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...

CVE-2026-42353 Path traversal / SSRF in i18next-http-middleware via user-controlled language and namespace parameters

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...

CVE-2026-42353 Path traversal / SSRF in i18next-http-middleware via user-controlled language and namespace parameters

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...

CVE-2026-42353

CVE-2026-42353 affects i18next-http-middleware prior to 3.9.3. User-controlled lng and ns values flow from getResourcesHandler directly into i18next.services.backendConnector.load, and depending on the configured backend this can enable path traversal or SSRF. Public advisories (GHSA-jfgf-83c5-2c...

CVE-2026-41683 HTTP response splitting and DoS in i18next-http-middleware via unsanitised Content-Language header

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 wrote user-controlled language values into the Content-Language response header after passing them through utils.escape, which ...

CVE-2026-41683 HTTP response splitting and DoS in i18next-http-middleware via unsanitised Content-Language header

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 wrote user-controlled language values into the Content-Language response header after passing them through utils.escape, which ...

CVE-2026-41683 HTTP response splitting and DoS in i18next-http-middleware via unsanitised Content-Language header

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 wrote user-controlled language values into the Content-Language response header after passing them through utils.escape, which ...

CVE-2026-41683

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 wrote user-controlled language values into the Content-Language response header after passing them through utils.escape, which ...

CVE-2026-41690 Prototype pollution and path traversal in i18next-http-middleware via user-controlled language and namespace parameters

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...

i18next-http-middleware 跨站脚本漏洞

i18next-http-middleware is an open-source HTTP internationalization middleware for Node.js and Deno by i18next. Versions of i18next-http-middleware prior to version 3.9.3 had a cross-site scripting vulnerability. This vulnerability stemmed from incorrectly clearing control characters such as...

i18next-http-middleware 路径遍历漏洞

i18next-http-middleware is an open-source HTTP internationalization middleware for Node.js and Deno by i18next. Versions of i18next-http-middleware prior to version 3.9.3 contained a path traversal vulnerability. This vulnerability stemmed from the lack of cleaning user-controlled lng and ns...

@ainsleydev/payload-helper (>=0.0.1 <=0.0.2), @bsct/payload (=1.0.0) +90 more potentially affected by CVE-2026-42353 via i18next-http-middleware (>=3.0.2 <=3.9.2)

i18next-http-middleware NPM version =3.0.2, =0.0.1, =1.0.1, =0.0.1, =0.0.1, =0.0.1, =8.0.0, =3.0.0, =1.0.0, =1.0.6, =1.0.0, =0.0.1, =0.0.229 and more Source cves: CVE-2026-42353 Source advisory: SNYK:JS-I18NEXTHTTPMIDDLEWARE-16415528...

Server-side Request Forgery (SSRF)

Overview i18next-http-middleware is an i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the lng and ns parameters used by...

i18next-http-middleware has path traversal / SSRF via user-controlled language and namespace parameters

Summary Versions of i18next-http-middleware prior to 3.9.3 pass the user-controlled lng and ns values from getResourcesHandler directly into i18next.services.backendConnector.loadlanguages, namespaces, … without any sanitisation. Depending on which backend is configured, the unvalidated path...

GHSA-JFGF-83C5-2C4M i18next-http-middleware has path traversal / SSRF via user-controlled language and namespace parameters

Summary Versions of i18next-http-middleware prior to 3.9.3 pass the user-controlled lng and ns values from getResourcesHandler directly into i18next.services.backendConnector.loadlanguages, namespaces, … without any sanitisation. Depending on which backend is configured, the unvalidated path...

HTTP Response Splitting

Overview i18next-http-middleware is an i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Affected versions of this package are vulnerable to HTTP Response Splitting via the lng parameter, which is passed through to the...

@ainsleydev/payload-helper (>=0.0.1 <=0.0.2), @bsct/payload (=1.0.0) +90 more potentially affected by CVE-2026-41690 via i18next-http-middleware (>=3.0.2 <=3.9.2)

i18next-http-middleware NPM version =3.0.2, =0.0.1, =1.0.1, =0.0.1, =0.0.1, =0.0.1, =8.0.0, =3.0.0, =1.0.0, =1.0.6, =1.0.0, =0.0.1, =0.0.229 and more Source cves: CVE-2026-41690 Source advisory: SNYK:JS-I18NEXTHTTPMIDDLEWARE-16415526...

Prototype Pollution

Overview i18next-http-middleware is an i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Affected versions of this package are vulnerable to Prototype Pollution via the lng or ns parameters handled by the getResourcesHandler...