cryptonist

Hacks

Crypto hacks on Arbitrum

Data as of 3 October 2026

98 recorded incidents on Arbitrum took $1.2B in total between 2022 and 2026. The largest was Kelp, $293.0M in 2026. That is 7.6% of all incidents in DefiLlama's record and 5.6% of the value lost. A multi-chain incident counts its full amount on each chain it touched, so chain totals overlap and together exceed the overall total. Amounts are the losses DefiLlama records, and its record does not say whether they are before or after any recovery. Data as of 3 October 2026.

By year, on Arbitrum

  • 2022 $88.9M lost
    4 incidents
  • 2023 $137.1M lost
    25 incidents
  • 2024 $146.9M lost
    24 incidents
  • 2025 $441.5M lost
    17 incidents
  • 2026 $365.5M lost
    28 incidents
Incidents per year on Arbitrum, with value lost in millions of US dollars. Source: DefiLlama, retrieved 3 October 2026.

Incidents on Arbitrum

Incidents on Arbitrum. Newest first. Source: DefiLlama.
DateIncidentClass TechniqueChainsAmount
2026-08-08 Atomic Green Input Validation Signature Replay Arbitrum $30K
2026-07-26 Garden Frontend & Infrastructure Database Breach Ethereum, Base, Arbitrum, BSC $450K
2026-07-24 Triple-A Key Compromise Hot Wallet Key Compromised Ethereum, Tron, Arbitrum $9.7M
2026-07-22 AFX Bridge Key Compromise Validator Key Compromised Arbitrum $24.1M
2026-07-15 Ostium Key Compromise Private Key Compromised Arbitrum $23.8M
2026-07-15 Cascade Liquidity Strategy Oracle Manipulation Spot Price Manipulation Arbitrum $1.3M
2026-07-13 Lumi Finance Input Validation Signature Verification Flaw Arbitrum $270K
2026-05-27 Stake DAO Yield Key Compromise Deployer Key Compromised Arbitrum $91K
2026-05-25 New Market Trading Access Control Improper Access Control Ethereum, Base, Arbitrum $4.0M
2026-05-24 Fractal Protocol Reentrancy Reentrancy Arbitrum $14K
2026-05-17 SEA Token Oracle Manipulation Spot Price Manipulation Arbitrum $153K
2026-05-17 MetaSea Protocol Logic Withdrawal Logic Flaw Arbitrum $110K
2026-05-13 ShapeShift FOX Colony Access Control Arbitrary External Call Arbitrum $133K
2026-05-12 Aurellion Access Control Uninitialized Proxy Arbitrum $456K
2026-05-10 Renegade Access Control Uninitialized Proxy Arbitrum $209K
2026-05-01 Sharwa.Finance Oracle Manipulation Spot Price Manipulation Arbitrum $33K
2026-04-27 ZetaChain Access Control Token Approval Abuse Ethereum, Base, Polygon, Arbitrum, Avalanche, BSC $334K
2026-04-18 Kelp Bridge & Cross-Chain Cross-Chain Message Spoofing Ethereum, Arbitrum $293.0M
2026-04-12 Hyperbridge Bridge & Cross-Chain Forged Proof Ethereum, Base, BSC, Arbitrum $2.5M
2026-04-07 SquidMulticall Access Control Improper Access Control Arbitrum, BSC, Avalanche, Optimism, Base $517K
2026-04-03 Silo V2 Oracle Manipulation Oracle Misconfiguration Arbitrum $359K
2026-03-28 VTSwapHook Protocol Logic Swap Logic Flaw Arbitrum $0
2026-03-12 Stake DAO Yield Access Control Caller Impersonation Arbitrum, Base $176K
2026-02-28 Wise Lending V2 Access Control Improper Access Control Arbitrum, Ethereum $66K
2026-01-10 FutureSwap Protocol Logic Withdrawal Logic Flaw Arbitrum $395K
2026-01-06 Fusion by IPOR Access Control Arbitrary External Call Arbitrum $336K
2026-01-05 USDGambit and TLP Key Compromise Deployer Key Compromised Arbitrum $1.5M
2026-01-05 TMX TRIBE Token & Share Accounting Arithmetic Error Arbitrum $1.4M
2025-11-03 Balancer V2 Token & Share Accounting Rounding Error Ethereum, Arbitrum, Base, Polygon, Sonic, Optimism $128.0M
2025-10-30 Garden Frontend & Infrastructure Key Leaked via Infrastructure Ethereum, Arbitrum, Base, Solana $11.4M
2025-10-20 Sharwa.Finance Protocol Logic Swap Logic Flaw Arbitrum $146K
2025-09-22 UXLINK Access Control Delegatecall Hijack Ethereum, Arbitrum $11.3M
2025-08-14 BtcTurk Key Compromise Hot Wallet Key Compromised Ethereum, Avalanche, Arbitrum, Base, Optimism, Mantle, Polygon $48.0M
2025-07-24 WOO X Social Engineering Phishing Bitcoin, Ethereum, Arbitrum, BSC $14.0M
2025-07-10 Kinto Bridge Access Control Uninitialized Proxy Arbitrum $1.6M
2025-07-09 GMX V1 Perps Reentrancy Reentrancy Arbitrum $42.0M
2025-06-18 Nobitex Social Engineering Malware Tron, Ethereum, BSC, Avalanche, Arbitrum, Polygon, Bitcoin $82.0M
2025-05-16 Demex Oracle Manipulation Spot Price Manipulation Arbitrum $951K
2025-04-22 Bitcoin Mission Access Control Improper Access Control Arbitrum $1.3M
2025-04-18 Numa Oracle Manipulation Spot Price Manipulation Arbitrum $506K
2025-04-01 Zapper Frontend & Infrastructure DNS Hijack Ethereum, Arbitrum, Optimism, Polygon, Base $0
2025-03-25 Abracadabra Spell Protocol Logic Liquidation Logic Flaw Arbitrum $13.0M
2025-01-23 Phemex Key Compromise Hot Wallet Key Compromised Ethereum, Solana, XRPL, Bitcoin, BSC, Sui, Base, Tron, Arbitrum, Avalanche, Polygon, Optimism, zkSync Era $85.0M
2025-01-08 Moby Key Compromise Private Key Compromised Arbitrum $1.5M
2025-01-08 Orange Finance Key Compromise Private Key Compromised Arbitrum $840K
2024-11-11 DeltaPrime Input Validation Missing Input Validation Arbitrum, Avalanche $4.8M
2024-10-30 SUNRAY·FINANCE Key Compromise Private Key Compromised Arbitrum $2.9M
2024-10-25 AARK (Aark Digital) Token & Share Accounting Decimal Miscalculation Arbitrum $1.9M
2024-10-24 Ramses Exchange Protocol Logic Reward Logic Flaw Arbitrum $93K
2024-10-18 Tapioca DAO Social Engineering Impersonation Scam Arbitrum $4.7M
2024-10-16 Radiant V2 Social Engineering Blind Signing BSC, Arbitrum $50.0M
2024-09-16 DeltaPrime Key Compromise Private Key Compromised Arbitrum $6.0M
2024-07-23 DeltaPrime Access Control Ownership Takeover Arbitrum $1.0M
2024-05-31 MixedSwapRouter Access Control Arbitrary External Call Arbitrum $16K
2024-05-14 Predy Finance Access Control Improper Access Control Arbitrum $464K
2024-05-06 Perpy Access Control Uninitialized Proxy Arbitrum $132K
2024-04-30 Pike V1 Access Control Proxy Upgrade Hijack Ethereum, Optimism, Arbitrum $1.6M
2024-04-30 Yield Protocol Token & Share Accounting Incorrect Share Accounting Arbitrum $181K
2024-04-23 Magpie Protocol Input Validation Missing Input Validation Ethereum, Polygon, BSC, Blast, Avalanche, Arbitrum, Optimism, Base, zkSync Era, Polygon zkEVM $129K
2024-04-20 Rico Access Control Arbitrary External Call Arbitrum $0
2024-04-19 Hedgey Input Validation Missing Input Validation Arbitrum, Ethereum $44.7M
2024-03-29 Lava Protocol Logic Liquidation Logic Flaw Arbitrum $340K
2024-03-15 Mozaic Key Compromise Private Key Compromised Arbitrum $2.0M
2024-03-05 WOOFi Swap Oracle Manipulation Spot Price Manipulation Arbitrum $8.8M
2024-02-28 Seneca Access Control Token Approval Abuse Ethereum, Arbitrum $6.4M
2024-01-27 Citadel.one Access Control Improper Access Control Arbitrum $93K
2024-01-22 Concentric Social Engineering Phishing Arbitrum $1.7M
2024-01-04 Gamma Oracle Manipulation Spot Price Manipulation Arbitrum $4.5M
2024-01-02 Radiant V2 Token & Share Accounting Rounding Error Arbitrum $4.5M
2023-12-30 Locus Finance Key Compromise Private Key Compromised Ethereum, Arbitrum $321K
2023-11-22 KyberSwap Elastic Token & Share Accounting Rounding Error Ethereum, Base, Polygon, Optimism, Arbitrum $48.0M
2023-11-06 TheStandard.io Protocol Logic Swap Logic Flaw Arbitrum $290K
2023-10-13 Beluga Oracle Manipulation Spot Price Manipulation Arbitrum $175K
2023-09-12 CoinEx Key Compromise Hot Wallet Key Compromised Ethereum, BSC, Bitcoin, Tron, Kadena, Solana, Dagger, XRPL, BitcoinCash, Polygon, Stellar, Arbitrum $55.0M
2023-09-06 GMBL.COMPUTER Input Validation Signature Verification Flaw Arbitrum $770K
2023-08-01 Neutra Finance Oracle Manipulation Spot Price Manipulation Arbitrum $36K
2023-07-04 Rodeo Protocol Logic Unknown Arbitrum $90K
2023-06-27 Themis Protocol Oracle Manipulation Spot Price Manipulation Arbitrum $370K
2023-06-15 Hashflow Access Control Token Approval Abuse Ethereum, Arbitrum, Avalanche, BSC, Polygon $605K
2023-06-15 Hyperliquid Market Manipulation Risk Parameter Abuse Arbitrum $37K
2023-05-30 El Dorado Exchange Protocol Logic Swap Logic Flaw Arbitrum $120K
2023-05-28 Jimbos Protocol Oracle Manipulation Spot Price Manipulation Arbitrum $7.5M
2023-05-19 Swaprum Rugpull Backdoor Contract Arbitrum $3.0M
2023-05-05 DEUS Finance Token & Share Accounting Arithmetic Error Arbitrum, BSC, Ethereum $6.5M
2023-04-20 Tales of Elleria Bridge & Cross-Chain Forged Proof Arbitrum $280K
2023-04-11 Paribus Reentrancy Reentrancy Arbitrum $68K
2023-04-10 SushiSwap Input Validation Missing Input Validation Ethereum, Arbitrum, Optimism, BSC $3.3M
2023-04-04 Sentiment Reentrancy Reentrancy Arbitrum $1.0M
2023-03-07 Tender Finance Oracle Manipulation Stale Oracle Price Arbitrum $1.6M
2023-03-02 ArbiSwap Rugpull Liquidity Rug Arbitrum $100K
2023-02-20 Dexible V2 Access Control Arbitrary External Call Ethereum, Arbitrum $2.0M
2023-02-20 Hope Finance Access Control Arbitrary External Call Arbitrum $2.0M
2023-02-10 dForce Lending Reentrancy Read-Only Reentrancy Arbitrum, Optimism $3.6M
2023-02-04 Sperax USD Token & Share Accounting Unbacked Mint Arbitrum $250K
2022-12-10 Lodestar V0 Oracle Manipulation Spot Price Manipulation Arbitrum $6.9M
2022-09-18 GMX V1 Perps Market Manipulation Stale Price Arbitrage Arbitrum $565K
2022-05-01 Rari Capital Reentrancy Reentrancy Ethereum, Arbitrum $80.0M
2022-03-03 Treasure Input Validation Missing Input Validation Arbitrum $1.4M

Source: DefiLlama, retrieved 3 October 2026, under its open methodology. Figures are a dated snapshot, not a live feed.