Summary

The SablierV2Lockup contract implements ERC4906 standard. This standard is EIP721 extension and it adds events when token's metadata is updated.

Vulnerability Details

As can be seen here, the standard states that:

The supportsInterface method MUST return true when called with 0x49064906.

This can not be seen in the smart contract, which does not comply with ERC4906.

Impact

Contract not complies with inherited standard.

Tools Used

Manual Review

Recommendations

Add supportsInterface method that will return true when called with 0x49064906.