GHSA-92pp-h63x-v22m

## Summary

A path handling inconsistency in `serveStatic` allows protected static files to be accessed by using repeated slashes (`//`) in the request path.

When route-based middleware (e.g., `/admin/*`) is used for authorization, the router may not match paths containing repeated slashes, while `serveStatic` resolves them as normalized paths. This can lead to a middleware bypass.

## Details

The routing layer and `serveStatic` handle repeated slashes differently.

For example:

- `/admin/secret.txt` => matches `/admin/*` - `//admin/secret.txt` => may not match `/admin/*`

This inconsistency allows a request such as:

``` GET //admin/secret.txt ```

to bypass middleware registered on `/admin/*` and access protected files.

## Impact

An attacker can access static files that are intended to be protected by route-based middleware by using repeated slashes in the request path.

This can lead to unauthorized access to sensitive files under the static root.

This issue affects applications that rely on `serveStatic` together with route-based middleware for access control.