https://github.com/code-423n4/2024-07-reserve/blob/3f133997e186465f4904553b0f8e86ecb7bbacbf/contracts/p1/StRSRVotes.sol#L176
The StRSRVotes.delegateBySig() function allows a signer to delegate voting power to a designed delegate via a gasless call.
If we look at the logic that verifies the signature verification:
We can see that the era is missing from the signed payload at L176.
This means that a delegation signature can be reused across era changes, despite balances and voting power no longer apply.
Consider adding an era field to the signed payload for StRSRVotes.delegateBySig()
