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`.
Problem types
CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
Product status
References
github.com/...t-intl/security/advisories/GHSA-8f24-v5vv-gm5j
github.com/amannn/next-intl/pull/2304
github.com/...ommit/1c80b668aa6d853f470319eec10a3f61e78a70e6
github.com/amannn/next-intl/releases/tag/v4.9.1