What is downstream liability?

downstream liability is one of threats to the information security which mean that :

if a company A's ,company its name A,information system is compromised by perpetrator ,attacker, and used to attack company B's ,company its name B, then a company A can be liable for damage to company B . the company B is "downstream"company in this attack scenario . that put A's security and operation on trial .

done by Maad Sameer