CVE-2026-94483
Received Received - Intake

Image Optimization DNS Hijacking in Next.js

Publication date: 2026-10-02

Last updated on: 2026-10-02

Assigner: GitHub, Inc.

Description
Next.js is a React framework for building full-stack web applications. From 16.0.0 until 16.3.8, Image Optimization can follow attacker-controlled DNS resolution for a remote URL that matches images.remotePatterns, allowing the optimized image fetch to reach private IP addresses after the URL passes the allow-list check. Applications without images.remotePatterns are not affected. Administrators unable to upgrade should audit allow-listed hosts and avoid entries whose DNS records are not trusted. This issue is fixed in version 16.3.8.

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Meta Information

Published
2026-10-02
Last Modified
2026-10-02
Generated
2026-10-02
AI Q&A
2026-10-02
EPSS Evaluated
N/A
NVD
CVE-2026-94483
EUVD
EUVD-2026-91671

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
vercel next.js to 16.3.8 (inc)
vercel next.js to 16.3.0 (exc)
vercel next.js 16.3.8

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

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Executive Summary

Next.js versions 16.0.0 to 16.3.8 have an Image Optimization feature that follows attacker-controlled DNS resolution for remote URLs matching images.remotePatterns. This allows optimized image fetches to reach private IP addresses even after passing the allow-list check. Only applications with images.remotePatterns configured are affected.

Impact Analysis

An attacker could exploit this to bypass network restrictions and access internal systems or private IP addresses through your application's image optimization feature. This could lead to data exfiltration or unauthorized access to sensitive resources.

Compliance Impact

This vulnerability could violate compliance requirements by allowing unauthorized access to private systems, potentially exposing personal or sensitive data. Organizations may face penalties for failing to protect data under regulations like GDPR or HIPAA.

Mitigation Strategies

Upgrade Next.js to version 16.3.8 or later to fix the vulnerability. If upgrading is not possible, audit all entries in images.remotePatterns and ensure their DNS records are trusted to prevent private IP access.

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