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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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.
    (CVE-2026-75604)

The Next.js Framework on the remote host is affected by a remote code execution vulnerability:

  - A vulnerability in applications using both the Pages Router and App Router without Cache Components can     lead to unauthenticated remote code execution when the Next.js server uses a Windows filesystem. Linux and     macOS are not affected by this issue. There is no known workaround for affected Windows-hosted     applications. (CVE-2026-75604)

Exploitation additionally requires that the application uses the Pages Router or the App Router without Cache Components, and that the server runs on a Windows filesystem. Nessus cannot verify the router configuration of the application, so this finding is reported as a potential vulnerability.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
461954	Echo: next: security update to 15.5.24	Tenable Cloud Security	Echo Local Security Checks	Local	critical
461954	Echo: next: security update to 15.5.24	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	critical
342568	Next.js Framework 13.4 < 15.5.24 / 16.x < 16.3.3 RCE (Windows)	Nessus	Windows	Local	critical

Detections

Analytics

CVE-2026-75604

critical

Tenable Plugins

critical

critical

critical