[issue35755] Remove current directory from posixpath.defpath to enhance security

[Alexey Izbyshev]

Alexey Izbyshev <izbyshev at ispras.ru> added the comment:

Thanks for the info on CS_PATH, Victor. IMHO it'd make sense to use the libc-provided default PATH at least in shutil.which() since its intent is to emulate "which" from the default shell.

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<https://bugs.python.org/issue35755>
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