GHSA-93hq-5wgc-jc82 GovernorCompatibilityBravo may trim proposal calldata

• npm @openzeppelin/contracts: >= 4.3.0, < 4.8.3 → fixed in 4.8.3 • npm @openzeppelin/contracts-upgradeable: >= 4.3.0, < 4.8.3 → fixed in 4.8.3

Impact The proposal creation entrypoint (`propose`) in `GovernorCompatibilityBravo` allows the creation of proposals with a `signatures` array shorter than the `calldatas` array. This causes the additional elements of the latter to be ignored, and if the proposal succeeds the corresponding actions would eventually execute without any calldata. The `ProposalCreated` event correctly represents what will eventually execute, but the proposal parameters as queried through `getActions` appear to respect the original intended calldata. Patches This issue has been patched in v4.8.3. Workarounds Ensure that all proposals that pass through governance have equal length `signatures` and `calldatas` parameters.