CVE-2026-94485: Next Next.js Has Information Disclosure Vulnerability

MODERATE
Advisory Identifier: GHSA-f87g-xv8r-7p7x
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CVSS 5.3
CWE-346
Published
Advisory Summary

CVE-2026-94485 is a MODERATE (CVSS 5.3) next.js has information disclosure vulnerability (CWE-346: Origin Validation Error) affecting Next libraries in the npm ecosystem. The issue involves next.js has information disclosure in app router metadata image routes via dynamicparams bypass. Remediation is available by upgrading affected packages to version 16.3.8.

CVE-2026-94485 at a Glance

CVE Identifier CVE-2026-94485
GHSA Identifier GHSA-f87g-xv8r-7p7x
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-346: Origin Validation Error
Affected Product Next
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-94485

To remediate this vulnerability, upgrade all affected Next dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

next fixed: 16.3.8 
npm install next@16.3.8
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls next

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-94485, inspect your project dependencies using npm:

npm ls next

Analyze the terminal output to locate any version of Next in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 16.3.8), your application is affected.

Note: The npm ls next command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-346: Origin Validation Error, where the product does not properly verify that the source of data or communication is valid. In Next, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

In Next.js App Router applications built with webpack, metadata image routes such as opengraph-image and twitter-image ignore the `dynamicParams` route segment option. An attacker can request metadata image URLs for dynamic segments that were deliberately excluded from `generateStaticParams()`.

CVE-2026-94485 Affected Next Versions

1 component(s)
Fixed Versions:
16.3.8
Product / Package Ecosystem Affected Versions Fixed Version
next
npm/next
npm
≥ 16.0.0
< 16.3.8
16.3.8

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vercel/next.js/security/advisories/GHSA-f87g-xv8r-7p7x
NVD — CVE-2026-94485 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-94485
Security Fix Commit FIX COMMIT
https://github.com/vercel/next.js/commit/2d9f50a409312696145b82b3157aadb6b1fef476
Next Source Repository REPOSITORY
https://github.com/vercel/next.js
Next Release RELEASE
https://github.com/vercel/next.js/releases/tag/v16.3.8

Frequently Asked Questions

What is CVE-2026-94485?
CVE-2026-94485 is a security vulnerability in Next involving Next.js has information disclosure in App Router metadata image routes via dynamicParams bypass under CWE-346: Origin Validation Error.
Which Next versions are affected?
Affected versions include releases prior to 16.3.8 across affected packages: next.
What version fixes CVE-2026-94485?
Upgrading to 16.3.8 (or the latest patched release for your respective branch) resolves the vulnerability.
Is next affected?
Yes, next is affected in releases prior to 16.3.8. Upgrade your dependency to 16.3.8 or later.
What is the CVSS score of CVE-2026-94485?
CVE-2026-94485 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-94485?
CVE-2026-94485 is classified under CWE-346: Origin Validation Error (The product does not properly verify that the source of data or communication is valid.).
How can I check npm dependencies for CVE-2026-94485?
Run the dependency tree command: 'npm ls next'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-f87g-xv8r-7p7x",
  "modified" : "2026-10-07T20:31:33Z",
  "published" : "2026-10-07T20:31:33Z",
  "aliases" : [ "CVE-2026-94485" ],
  "summary" : "Next.js has information disclosure in App Router metadata image routes via dynamicParams bypass",
  "details" : "In Next.js App Router applications built with webpack, metadata image routes such as opengraph-image and twitter-image ignore the `dynamicParams` route segment option. An attacker can request metadata image URLs for dynamic segments that were deliberately excluded from `generateStaticParams()`.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "next"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "16.0.0"
      }, {
        "fixed" : "16.3.8"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vercel/next.js/security/advisories/GHSA-f87g-xv8r-7p7x"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-94485"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vercel/next.js/commit/2d9f50a409312696145b82b3157aadb6b1fef476"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vercel/next.js"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vercel/next.js/releases/tag/v16.3.8"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-346" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-07T20:31:33Z",
    "nvd_published_at" : "2026-10-02T16:16:51Z"
  }
}