GHSA-GWM6-Q8CH-HCFR install -D: symlink race in directory creation allows arbitrary file overwrite

The -D path runs fs::createdirall on a pathname then later opens the destination via path-based File::create/fs::copy, neither anchored to a directory fd. Between the two, an attacker can replace a path component with a symlink, redirecting the write. Impact: an attacker with concurrent write...