Radiant V2 Hack

TOTAL LOST $4.5M
Medium Flashloan New Market Exploit arbitrum

Summarize with AI

Affected Chain arbitrum Incident surface
Recovered - No recovery reported
All-Time Rank #454 By amount stolen
Auditors 1 Prior security audit

Incident Overview

Radiant v2 introduces a migration to the LayerZero OFT format, improving cross-chain fee sharing, enabling faster launches on additional chains, and allowing native ownership of bridging contracts. This update addresses utility exchange concerns and eligibility for RDNT emissions by implementing changes to core protocol mechanics, emissions, utility, and enhancing cross-chain functionality

Incident Report

Protocol / Project Radiant V2
Date of Incident
Affected Chain(s) arbitrum
Attack Technique Flashloan New Market Exploit
Classification Protocol Logic
Primary Source View Post-Mortem

Protocol Information

Protocol Type Lending
Smart Contract Language Solidity
Protocol Twitter/X @RDNTCapital

Market Context at Time of Hack

Token Categories
PoW Platform DeFi Smart Contracts

What the Attacker Needed to Succeed

Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.

Technical Knowledge Deep understanding of flashloan new market exploit and Solidity and EVM internals
Capital Required Seed capital to cover gas and initial position setup
On-Chain Access Ability to interact with arbitrum smart contracts and deploy a custom exploit contract
Protocol Analysis Identification of the exploitable vulnerability in Radiant V2's contract logic - root cause: protocol logic
Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single atomic block
Obfuscation Plan A strategy to launder and move stolen funds - typically through mixers, cross-chain bridges, or decentralized DEX swaps to resist tracing

What Auditors Should Check

Could this have been caught in audit? Likely — with a thorough Flashloan New Market Exploit audit checklist and test coverage
Audited by Audit Report 1 — still lost $4.5M. Prior audits don't guarantee safety, especially after post-audit code changes.

If you're auditing a protocol with similar architecture to Radiant V2, these are the critical security checks that could have prevented this incident (January 2024).

  • Verify all logic paths related to Flashloan New Market Exploit are guarded by proper access controls and input validation - see the Flash Loans Attacks attack class for patterns
  • Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs

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Security Audit History

Related Attack Classes

The technique used in this hack maps to these vulnerability classes in our security curriculum:

See all Flash Loans Attacks examples →

Sources & References

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