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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-75604
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-01 22:17:12 UTC
Updated2026-09-01 22:17:12 UTC
DescriptionNext.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.

Risk And Classification

Primary CVSS: v3.1 9 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Problem Types: CWE-22 | CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9CRITICALCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED9CRITICALCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Vercel Next.js affected >= 13.4.0, < 15.5.24 Not specified
CNA Vercel Next.js affected >= 16.0.0, < 16.3.3 Not specified

References

ReferenceSourceLinkTags
github.com/vercel/next.js/releases/tag/v16.3.3 [email protected] github.com
github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36 [email protected] github.com
github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b [email protected] github.com
github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3 [email protected] github.com
github.com/vercel/next.js/releases/tag/v15.5.24 [email protected] github.com
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