{
"id": "GHSA-6gpp-xcg3-4w24",
"aliases": [
"CVE-2026-64642"
],
"details": "## Impact\n\nCrafted requests targeting Next.js applications using App Router built with Turbopack and a **single** entry in `config.i18n.locales` can bypass middleware/proxy based authentication.\n\n## Workarounds\n\nIf you cannot upgrade immediately, enforce authorization in the page's server-side data path instead of relying solely on middleware.",
"summary": "Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "16.0.0"
},
{
"fixed": "16.2.11"
}
]
}
],
"package": {
"name": "next",
"ecosystem": "npm"
}
}
],
"modified": "2026-07-22T22:59:38Z",
"severity": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"
}
],
"published": "2026-07-22T22:59:38Z",
"references": [
{
"url": "https://github.com/vercel/next.js/security/advisories/GHSA-6gpp-xcg3-4w24",
"type": "WEB"
},
{
"url": "https://github.com/vercel/next.js/pull/96014",
"type": "WEB"
},
{
"url": "https://github.com/vercel/next.js/commit/6bf4df14508ad6c0cd46af50c6051ee42f2d9151",
"type": "WEB"
},
{
"url": "https://github.com/vercel/next.js",
"type": "PACKAGE"
},
{
"url": "https://github.com/vercel/next.js/releases/tag/v16.2.11",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-285"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": null,
"github_reviewed_at": "2026-07-22T22:59:38Z"
}
}