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1 vulnerability by amannn

CVE-2026-40299 (GCVE-0-2026-40299)

Vulnerability from cvelistv5 – Published: 2026-04-17 20:49 – Updated: 2026-04-17 20:49
VLAI?
Title
next-intl has an open redirect vulnerability
Summary
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`.
Severity ?
6.9 (Medium)
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
CWE
  • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
Impacted products
Vendor Product Version
amannn next-intl Affected: < 4.9.1
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