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Public proof of conceptFix available

CVE-2026-75604

A public proof of concept exists; no exploitation attested.

  • Published2026-09-01
  • Fixed in16.3.3 · 15.5.24
  • WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Next.js is a React framework for building full-stack web applications. From 13.4.0 until 15.5.24 and 16.3.3, Next.js applications using Pages Router or App Router without Cache Components on Windows-hosted servers do not consistently escape backslashes in route segments before constructing incremental-cache paths. In packages/next/src/shared/lib/router/utils/escape-path-delimiters.ts and packages/next/src/server/lib/incremental-cache/file-system-cache.ts, a remote request can supply encoded Windows path separators that traverse outside the intended cache root and expose private build data, including the server-reference-manifest encryption key. Disclosure of that key can enable remote code execution in the affected application. This issue is fixed in versions 15.5.24 and 16.3.3.

Timeline

dates in UTC
  1. 2026-09-0122:17CVE publishedNVD

Versions per branch

OSV
Next.js
BranchAffectedFixed in
16.x≥ 16.0.0, < 16.3.316.3.3
15.5≥ 13.4.0, < 15.5.2415.5.24

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • vercel next.js
    Affected
    • = >= 13.4.0, < 15.5.24no fix stated
    • = >= 16.0.0, < 16.3.3no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-09-01

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • @next/mdxTuxCare:npmfrom 16.0.6-tuxcare.0 · fixed in 16.0.6-tuxcare.9and 12 other packages
  • @next/mdxTuxCare:npmfrom 13.5.11-tuxcare.0 · fixed in 13.5.11-tuxcare.18and 9 other packages
  • @next/mdxTuxCare:npmfrom 14.2.35-tuxcare.0 · fixed in 14.2.35-tuxcare.9and 9 other packages
  • @next/swc-linux-x64-gnuTuxCare:npmfrom 15.1.2-tuxcare.0 · fixed in 15.1.2-tuxcare.3and 1 other package
  • @rootio/nextRoot:npmall versions · fixed in 14.2.5-root.io.5
  • @rootio/nextRoot:npmall versions · fixed in 13.4.19-root.io.6
  • @rootio/nextRoot:npmall versions · fixed in 13.4.19-root.io.7
  • @rootio/nextRoot:npmall versions · fixed in 13.5.11-root.io.5

268 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-75604 Red Hat Product Security

    next: Next.js: Unauthenticated Remote Code Execution on windows-hosted servers

Full record on NVD

Fix

  1. Update Next.js to 16.3.3 · 15.5.24

Detection

read 2026-11-06 06:14 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
1 moduleexploit/windows/http/nextjs_unauth_rce_cve_2026_75604rank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
2026-09-01
Last Modified
2026-09-09
NVD status
Deferred
GitHub Advisory
GHSA-p293-qw3h-jr36

Frequently asked questions

What is CVE-2026-75604?

Next.js is a React framework for building full-stack web applications. From 13.4.0 until 15.5.24 and 16.3.3, Next.js applications using Pages Router or App Router without Cache Components on Windows-hosted servers do not consistently escape backslashes in route segments before constructing incremental-cache paths. In packages/next/src/shared/lib/router/utils/escape-path-delimiters.ts and packages/next/src/server/lib/incremental-cache/file-system-cache.ts, a remote request can supply encoded Windows path separators that traverse outside the intended cache root and expose private build data, including the server-reference-manifest encryption key. Disclosure of that key can enable remote code execution in the affected application. This issue is fixed in versions 15.5.24 and 16.3.3.

Is CVE-2026-75604 actively exploited?

Active exploitation of CVE-2026-75604 has not been confirmed. Its EPSS score was 2.1% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-75604?

CVE-2026-75604 has a CVSS v3 base score of 9 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

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Sources for this record