When running in debug mode and the debug-embed (off by default) feature is not enabled, the generated get method does not check that the input path is a child of the folder given.

This allows attackers to read arbitrary files in the file system if they have control over the filename given. The following code will print the contents of your /etc/passwd if adjusted with a correct number of ../s depending on where it is run from.

#[derive(rust_embed::RustEmbed)]
#[folder = "src/"]
pub struct Asset;

fn main() {
    let d = Asset::get("../../../etc/passwd").unwrap().data;
    println!("{}", String::from_utf8_lossy(&d));
}

The flaw was corrected by canonicalizing the input filename and ensuring that it starts with the canonicalized folder path.

On Windows, configuring a named pipe server with pipe_mode will force ServerOptions::reject_remote_clients as false.

This drops any intended explicit configuration for the reject_remote_clients that may have been set as true previously.

The default setting of reject_remote_clients is normally true meaning the default is also overridden as false.

Workarounds

Ensure that pipe_mode is set first after initializing a ServerOptions. For example:

let mut opts = ServerOptions::new();
opts.pipe_mode(PipeMode::Message);
opts.reject_remote_clients(true);