Smart Contract Logic Flaw

A smart contract logic flaw is a bug in the executable code of a decentralized application that produces unintended behavior during execution. Unlike syntax errors, these flaws allow the contract to function as intended by the compiler but violate the economic or security goals of the developers.

Attackers exploit these gaps to manipulate internal state variables, such as balances or access permissions, to extract value. In bridge architectures, such flaws often manifest in the functions that handle deposit validation or withdrawal authorization.

Because these contracts are immutable once deployed, fixing such vulnerabilities often requires complex migration processes or emergency upgrades. These flaws represent the primary attack vector for automated exploits in the financial derivatives space, as they bypass traditional security perimeters.