| Package | Affected versions | Patched versions |
|---|
| next npm | ≥ 13.4.0, < 15.5.24≥ 16.0.0, < 16.3.3
| 15.5.2416.3.3
|
Description
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.
NVD 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.
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