{"id":"EUVD-2026-28791","revision":"92df1b878cc748daba258b4e50d0abdd","records":[{"revision":"92df1b878cc748daba258b4e50d0abdd","observedAt":"2026-11-03T08:03:27.739+00:00","statement":{"source":"euvd","id":"EUVD-2026-28791","aliases":["CVE-2026-41683","GHSA-c3h8-g69v-pjrg"],"title":"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 respon…","description":"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 is an HTML-entity encoder that does not strip carriage return, line feed, or other control characters. When the application used an older i18next (< 19.5.0) that still exercised the backward-compatibility fallback at LanguageDetector.js:100 or otherwise produced a raw detected value, CRLF sequences in the attacker-controlled lng parameter reached res.setHeader('Content-Language', ...) verbatim. This issue has been patched in version 3.9.3.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","score":8.6,"severity":null}],"references":["https://github.com/i18next/i18next-http-middleware/security/advisories/GHSA-c3h8-g69v-pjrg"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-28791","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 8, 2026, 3:27:05 PM","dateUpdated":"May 8, 2026, 11:29:00 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-28791","identifiers":["EUVD-2026-28791","CVE-2026-41683","GHSA-c3h8-g69v-pjrg"]},"retained":false,"historicalAffected":[]}],"coverage":[]}