[jknupp]

Pickle (or any use of eval) is a security risk only if you're using it in the context of untrusted code. Basically any distributed task queue is going to have that risk if it can execute arbitrary code.

[bagels]

I thought the risk was if the data came from an untrusted source, as it might contain code?

[jonesetc]

I think shooting it over the network is considered untrusted. Man in the middle becomes a problem.