CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
38.5%
@openzeppelin/contracts and @openzeppelin/contracts-upgradeable are vulnerable to Improper Input Validation. If a contract uses multiproofs for verification and the merkle tree processing includes a node with value 0 at depth 1, then the contract may be insecure. Balanced trees with three or fewer leaves may accidentally experience this, or a malicious tree builder is able to purposefully add such a node in the tree.