The shlex crate before 1.2.1 for Rust allows unquoted and unescaped instances of the { and \xa0 characters, which may facilitate command injection.
Why was this filed *now*? This was previously published as RUSTSEC-2024-0006, and has been fixed in versions 1.2.1 / 1.3.0 of the shlex crate one-and-a-half years ago.