PYSEC-2026-4295 PyMongo: PYTHON-5990 Forced Unix domain socket connection via a .sock KMS endpoint in client-side field level encryption

Summary PyMongo passed the KMS endpoint of a data key verbatim into parsehost, which returns any string ending in .sock unchanged instead of validating it as a hostname and port. The driver's connection code then treats such an address as a Unix domain socket path and connects to it with AFUNIX...