CVE-2026-64642NVD

Vulnerability Summary

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.

Severity Level

UNKNOWN

Published Date

Jul 22, 2026

Last Modified

Jul 27, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

1.01%Probability

Root Weakness (CWE)

CWE-285: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v4.0 Base Metrics — Score 8.3 (HIGH)

Attack VectorNetwork

Attack ComplexityLow

Attack RequirementsPresent

Privileges RequiredNone

User InteractionNone

Confidentiality (Vulnerable System)High

Integrity (Vulnerable System)Low

Availability (Vulnerable System)None

Confidentiality (Subsequent System)None

Integrity (Subsequent System)None

Availability (Subsequent System)None

Affected & Patched Versions

Affected Versions

vercel next.js >= >= 16.0.0, < 16.2.11

Patched Versions

Not provided by cveorg for this CVE.

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