Language: Java
Label: safe
CWE: CWE-22 \u2014 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Code:
  public void testEscapeToClasspathFromNull() throws Exception {
    router.clear();
    router.route().handler(StaticHandler.create("www"));
    // attempt to escape to classpath, given that the handler is mounted on a catch all path
    testRequest(HttpMethod.GET, "/..\\.htdigest", 404, "Not Found");
  }