CVE-2026-64645NVD

Vulnerability Summary

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
rewrites() or redirects() rule that builds its external destination hostname from request-controlled input can be pointed at an arbitrary hostname, regardless of the rule's hostname suffix. For a rewrite, Next.js proxies the request to that arbitrary host and serves the response from the application's origin, leading to Server-Side Request forgery. A redirects() rule configured this way is vulnerable to an Open Redirect. This issue has been fixed in versions 15.5.21 and 16.2.11.

Severity Level

HIGH(8.3)

Published Date

Jul 22, 2026

Last Modified

Jul 28, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.84%Probability

Root Weakness (CWE)

CWE-918: Unknown/Unlisted Weakness ↗

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

CWE-601: 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)Low

Integrity (Subsequent System)Low

Availability (Subsequent System)None

Affected & Patched Versions

Affected Versions

vercel next.js >= >= 12.0.0 < 15.5.21
vercel next.js >= >= 16.0.0, < 16.2.11

Patched Versions

Not provided by cveorg for this CVE.

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