security: restrict LOAD DATA LOCAL INFILE to query arguments via local_infile='only_args'#1249
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…FILE Adds a new local_infile='only_args' option that restricts LOAD DATA LOCAL INFILE to only allow files explicitly passed as query arguments. This prevents malicious MySQL servers from requesting arbitrary local files while maintaining full backward compatibility. - local_infile=True: existing behavior (allow any file) - local_infile=False: existing behavior (reject all) - local_infile='only_args': NEW - only allow files from query args Fixes: CWE-22 (Path Traversal) in LOAD DATA LOCAL INFILE Refs: PR PyMySQL#1247 maintainer feedback
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Revised fix addressing maintainer feedback from #1247. The new local_infile='only_args' mode restricts file loading to paths explicitly passed as query arguments, preventing arbitrary file reads.