{"id":"EUVD-2026-23543","revision":"dbc43122b7a14cd782683b6cc78dd76a","records":[{"revision":"dbc43122b7a14cd782683b6cc78dd76a","observedAt":"2026-10-28T05:01:52.801+00:00","statement":{"source":"euvd","id":"EUVD-2026-23543","aliases":["CVE-2026-40299","GHSA-8f24-v5vv-gm5j"],"title":"next-intl provides internationalization for Next.js. Applications using the `next-intl` middleware prior to version 4.9.1with `localePrefix: 'as-needed'` could construct URLs where path handling and the WHATWG URL parser resolved a relative…","description":"next-intl provides internationalization for Next.js. Applications using the `next-intl` middleware prior to version 4.9.1with `localePrefix: 'as-needed'` could construct URLs where path handling and the WHATWG URL parser resolved a relative redirect target to another host (e.g. scheme-relative `//` or control characters stripped by the URL parser), so the middleware could redirect the browser off-site while the user still started from a trusted app URL. The problem has been patchedin `next-intl@4.9.1`.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.9,"severity":null}],"references":["https://github.com/amannn/next-intl/security/advisories/GHSA-8f24-v5vv-gm5j","https://github.com/amannn/next-intl/pull/2304","https://github.com/amannn/next-intl/commit/1c80b668aa6d853f470319eec10a3f61e78a70e6","https://github.com/amannn/next-intl/releases/tag/v4.9.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-23543","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Apr 17, 2026, 8:49:05 PM","dateUpdated":"Apr 20, 2026, 3:58:51 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-2026-23543","identifiers":["EUVD-2026-23543","CVE-2026-40299","GHSA-8f24-v5vv-gm5j"]},"retained":false,"historicalAffected":[]}],"coverage":[]}