Language: Python
Label: safe
CWE: CWE-22 \u2014 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Code:
def safe_extract(tar, path=".", members=None, *, numeric_owner=False):
    for member in tar.getmembers():
        member_path = os.path.join(path, member.name)
        if not __is_within_directory(path, member_path):
            raise Exception("Attempted Path Traversal in Tar File")
    tar.extractall(path, members, numeric_owner)