CVE-2026-75604: Next Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-p293-qw3h-jr36
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CVSS 9.0
CWE-22
Published
Advisory Summary

CVE-2026-75604 is a CRITICAL (CVSS 9.0) remote code execution vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Next libraries in the npm ecosystem. The issue involves unauthenticated remote code execution on windows-hosted servers. Remediation is available by upgrading affected packages to version 15.5.24, 16.3.3.

CVE-2026-75604 at a Glance

CVE Identifier CVE-2026-75604
GHSA Identifier GHSA-p293-qw3h-jr36
Severity CRITICAL
CVSS v3.1 Base Score 9.0
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Next
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 9.0

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

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-75604

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: 15.5.24 
npm install next@15.5.24
next fixed: 16.3.3 
npm install next@16.3.3
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-2026-75604, 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 15.5.24), 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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. 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

## Impact A vulnerability in applications using Pages and App router without Cache Component can lead to remote code execution when the server is hosted on machines using a Windows filesystem. ## Workaround There is no known workaround for affected windows-hosted applications. You should upgrade immediately if your server is hosted on Windows.

CVE-2026-75604 Affected Next Versions

2 component(s)
Fixed Versions:
15.5.2416.3.3
Product / Package Ecosystem Affected Versions Fixed Version
next
npm/next
npm
≥ 13.4.0
< 15.5.24
15.5.24
next
npm/next
npm
≥ 16.0.0
< 16.3.3
16.3.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36
NVD — CVE-2026-75604 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-75604
Security Fix Commit FIX COMMIT
https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b
Security Fix Commit FIX COMMIT
https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3
Next Source Repository REPOSITORY
https://github.com/vercel/next.js
Next Release RELEASE
https://github.com/vercel/next.js/releases/tag/v15.5.24
Next Release RELEASE
https://github.com/vercel/next.js/releases/tag/v16.3.3

Frequently Asked Questions

What is CVE-2026-75604?
CVE-2026-75604 is a security vulnerability in Next involving Unauthenticated Remote Code Execution on windows-hosted servers under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Next versions are affected?
Affected versions include releases prior to 15.5.24, 16.3.3 across affected packages: next.
What version fixes CVE-2026-75604?
Upgrading to 15.5.24, 16.3.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is next affected?
Yes, next is affected in releases prior to 15.5.24, 16.3.3. Upgrade your dependency to 15.5.24, 16.3.3 or later.
What is the CVSS score of CVE-2026-75604?
CVE-2026-75604 has a CVSS v3.1 base score of 9.0 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2026-75604?
CVE-2026-75604 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check npm dependencies for CVE-2026-75604?
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-p293-qw3h-jr36",
  "modified" : "2026-09-08T20:51:40Z",
  "published" : "2026-09-08T20:51:40Z",
  "aliases" : [ "CVE-2026-75604" ],
  "summary" : "Next.js: Unauthenticated Remote Code Execution on windows-hosted servers",
  "details" : "## Impact\n\nA vulnerability in applications using Pages and App router without Cache Component can lead to remote code execution when the server is hosted on machines using a Windows filesystem.\n\n## Workaround\n\nThere is no known workaround for affected windows-hosted applications. You should upgrade immediately if your server is hosted on Windows.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
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      "name" : "next"
    },
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      "events" : [ {
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      }, {
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      "type" : "ECOSYSTEM",
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        "fixed" : "16.3.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-75604"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3"
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    "url" : "https://github.com/vercel/next.js/releases/tag/v15.5.24"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vercel/next.js/releases/tag/v16.3.3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-08T20:51:40Z",
    "nvd_published_at" : "2026-09-01T22:17:12Z"
  }
}