CVE-2026-64648

{"id": "CVE-2026-64648", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64648", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-28T14:14:02.950100Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.0, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "vercel", "product": "next.js", "versions": [{"status": "affected", "version": ">= 13.0.0, < 15.5.21"}, {"status": "affected", "version": ">= 16.0.0, < 16.2.11"}]}]}], "published": "2026-07-27T20:16:40.563", "references": [{"url": "https://github.com/vercel/next.js/commit/062f66700b52a5d6bba2c0605d55577ab7ad262c", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/vercel/next.js/commit/73b94872bc343d09494b50394d8c08eb9fc8e56a", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/vercel/next.js/releases/tag/v15.5.21", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/vercel/next.js/releases/tag/v16.2.11", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/vercel/next.js/security/advisories/GHSA-68g3-v927-f742", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-524"}]}], "descriptions": [{"lang": "en", "value": "Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, a server-side fetch with a request body may return a cached response body from a different request to the same URL but different body. Confidential data in the POST's response body would then leak to unauthorized requests. Though the request itself will not be deduped. This only applies to fetch calls with a request that has a different init than the one passed to fetch. A safe request would be: fetch(new Request(init), init). An unsafe request would be: fetch(new Request(init), aDifferentInit). This issue has been fixed in versions 15.5.21 and 16.2.11."}, {"lang": "es", "value": "Next.js es un framework de React para construir aplicaciones web full-stack. En las versiones 12.0.0 a 15.5.20 y 16.0.0 a 16.2.10, una operaci\u00f3n fetch del lado del servidor con un cuerpo de solicitud puede devolver un cuerpo de respuesta en cach\u00e9 de una solicitud diferente a la misma URL pero con un cuerpo diferente. Los datos confidenciales en el cuerpo de respuesta del POST se filtrar\u00edan entonces a solicitudes no autorizadas. Aunque la solicitud en s\u00ed no se desduplicar\u00e1. Esto solo se aplica a las llamadas fetch con una solicitud que tiene un init diferente al pasado a fetch. Una solicitud segura ser\u00eda: fetch(new Request(init), init). Una solicitud insegura ser\u00eda: fetch(new Request(init), aDifferentInit). Este problema ha sido solucionado en las versiones 15.5.21 y 16.2.11."}], "lastModified": "2026-10-24T13:10:00.147", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "59C65BAA-E45C-4948-9471-7D26EA66449C", "versionEndExcluding": "15.5.21", "versionStartIncluding": "12.0.0"}, {"criteria": "cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "841758BF-9324-4127-B087-6A8C1BADB389", "versionEndExcluding": "16.2.11", "versionStartIncluding": "16.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}