{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64642", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-20T17:11:30.895Z", "datePublished": "2026-07-27T17:45:40.761Z", "dateUpdated": "2026-07-27T17:45:40.761Z"}, "containers": {"cna": {"title": "Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale", "problemTypes": [{"descriptions": [{"cweId": "CWE-285", "lang": "en", "description": "CWE-285: Improper Authorization", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.3, "baseSeverity": "HIGH", "vectorString": "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", "version": "4.0"}}], "references": [{"name": "https://github.com/vercel/next.js/security/advisories/GHSA-6gpp-xcg3-4w24", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/vercel/next.js/security/advisories/GHSA-6gpp-xcg3-4w24"}, {"name": "https://github.com/vercel/next.js/pull/96014", "tags": ["x_refsource_MISC"], "url": "https://github.com/vercel/next.js/pull/96014"}, {"name": "https://github.com/vercel/next.js/commit/6bf4df14508ad6c0cd46af50c6051ee42f2d9151", "tags": ["x_refsource_MISC"], "url": "https://github.com/vercel/next.js/commit/6bf4df14508ad6c0cd46af50c6051ee42f2d9151"}, {"name": "https://github.com/vercel/next.js/releases/tag/v16.2.11", "tags": ["x_refsource_MISC"], "url": "https://github.com/vercel/next.js/releases/tag/v16.2.11"}], "affected": [{"vendor": "vercel", "product": "next.js", "versions": [{"version": ">= 16.0.0, < 16.2.11", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-27T17:45:40.761Z"}, "descriptions": [{"lang": "en", "value": "Next.js is a React framework for building full-stack web applications. In versions 16.0.0 through 16.2.10, crafted 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. This issue has been fixed in version 16.2.11."}], "source": {"advisory": "GHSA-6gpp-xcg3-4w24", "discovery": "UNKNOWN"}}}}

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