PYSEC-2026-526 rpc.py vulnerable to Deserialization of Untrusted Data

rpc.py through 0.6.0 allows Remote Code Execution because an unpickle occurs when the "serializer: pickle" HTTP header is sent. In other words, although JSON not Pickle is the default data format, an unauthenticated client can cause the data to be processed with unpickle. Per the maintainer, rpc....