The link you cite says it was worse in the Rust version:
> During the audit, it came to light that the original sudo implementation was also affected by [CLN-001: relative path traversal vulnerability], although with a lower security severity due to their use of the openat function.
> During the audit, it came to light that the original sudo implementation was also affected by [CLN-001: relative path traversal vulnerability], although with a lower security severity due to their use of the openat function.