CVE-2026-94483: CWE-918: Server-Side Request Forgery (SSRF) in vercel next.js
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.
AI Analysis
Technical Summary
Next.js, a React framework, contains an SSRF vulnerability (CWE-918) in its Image Optimization feature from versions 16.0.0 up to but not including 16.3.8. When images.remotePatterns is configured, an attacker can control DNS resolution for remote URLs, enabling the server to fetch images from private IP addresses despite allow-list checks. This can lead to unauthorized internal network access. The vulnerability does not affect applications that do not use images.remotePatterns. The vendor fixed this issue in version 16.3.8.
Potential Impact
An attacker can exploit this SSRF vulnerability to make the Next.js server perform unauthorized requests to internal or private IP addresses, potentially exposing internal services or data. The vulnerability requires the use of images.remotePatterns and attacker-controlled DNS resolution. There are no known exploits in the wild at this time. The CVSS 4.0 score is 8.3 (high severity), indicating a significant risk if exploited.
Mitigation Recommendations
Upgrade Next.js to version 16.3.8 or later where this SSRF vulnerability is fixed. If upgrading is not immediately possible, administrators should audit and restrict allow-listed hosts in images.remotePatterns to trusted DNS records only, avoiding entries that resolve to untrusted or private IP addresses.
CVE-2026-94483: CWE-918: Server-Side Request Forgery (SSRF) in vercel next.js
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.
CVSS v4.0
Score 8.3high
Affected software
vercel
next.js
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Next.js, a React framework, contains an SSRF vulnerability (CWE-918) in its Image Optimization feature from versions 16.0.0 up to but not including 16.3.8. When images.remotePatterns is configured, an attacker can control DNS resolution for remote URLs, enabling the server to fetch images from private IP addresses despite allow-list checks. This can lead to unauthorized internal network access. The vulnerability does not affect applications that do not use images.remotePatterns. The vendor fixed this issue in version 16.3.8.
Potential Impact
An attacker can exploit this SSRF vulnerability to make the Next.js server perform unauthorized requests to internal or private IP addresses, potentially exposing internal services or data. The vulnerability requires the use of images.remotePatterns and attacker-controlled DNS resolution. There are no known exploits in the wild at this time. The CVSS 4.0 score is 8.3 (high severity), indicating a significant risk if exploited.
Mitigation Recommendations
Upgrade Next.js to version 16.3.8 or later where this SSRF vulnerability is fixed. If upgrading is not immediately possible, administrators should audit and restrict allow-listed hosts in images.remotePatterns to trusted DNS records only, avoiding entries that resolve to untrusted or private IP addresses.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-09-21T17:25:42.292Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abfce5fa43b0b3b89cf6df9
Added to database: 10/02/2026, 15:31:43 UTC
Last enriched: 10/02/2026, 15:46:03 UTC
Last updated: 10/03/2026, 03:19:44 UTC
Views: 11
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