The require checks in HolographFactory.deployHolographableContract() can easily by bypassed by sending an invalid signature and signer = 0x0.
As a result, this will deploy a holographableContract and update the HolographRegistry and push an additional item to HolographRegistry._holographableContracts.
Due to _holographableContracts.push(contractAddress); in HolographRegistryInterface(registry).setHolographedHashAddress(hash, holographerAddress);
A malicious user can overpopulate the _holographableContracts array with redundant data, increasing gas costs when _holographableContracts is iterated through.
Implement valid access control on the HolographFactory.deployHolographableContract() to ensure only the relevant can deploy
