Web3 Security Trends

Updated 31 Oct 2026About these numbers
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01 Oct 2025–30 Sep 2026compared with 01 Oct 2024–30 Sep 2025
Reported loss$2.92B ↓ 68% vs prior period 338/356 loss amounts reported
Reported attacks356 ↑ 73% vs prior period
Median incident loss$459K ↓ 30% vs prior period
Largest incident$387.0M13% of known lossBitget

Attacks and losses over time

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Reported loss and attack counts from 2025-10-01 to 2026-09-30.Reported loss (USD)Attack count $0 $500M $1B 0 25 50 Oct 2025: $47.9M reported loss; 14 attacksOct 2025Nov 2025: $275.7M reported loss; 16 attacksNov 2025Dec 2025: $75.6M reported loss; 19 attacksDec 2025Jan 2026: $390.2M reported loss; 24 attacksJan 2026Feb 2026: $24.0M reported loss; 12 attacksFeb 2026Mar 2026: $42.3M reported loss; 26 attacksMar 2026Apr 2026: $649.6M reported loss; 35 attacksApr 2026May 2026: $79.7M reported loss; 44 attacksMay 2026Jun 2026: $80.4M reported loss; 36 attacksJun 2026Jul 2026: $250.3M reported loss; 41 attacksJul 2026Aug 2026: $260.9M reported loss; 47 attacksAug 2026Sep 2026: $742.6M reported loss; 42 attacksSep 2026

Top 5 incidents: 54% of loss

View chart as a table
PeriodReported lossAttacksKnown amounts
Oct 2025$47.9M1414 of 14
Nov 2025$275.7M1616 of 16
Dec 2025$75.6M1919 of 19
Jan 2026$390.2M2424 of 24
Feb 2026$24.0M1212 of 12
Mar 2026$42.3M2623 of 26
Apr 2026$649.6M3534 of 35
May 2026$79.7M4442 of 44
Jun 2026$80.4M3636 of 36
Jul 2026$250.3M4140 of 41
Aug 2026$260.9M4740 of 47
Sep 2026$742.6M4238 of 42

What changed

  1. Compared with the previous period, reported loss fell by $6.09B while incident count rose by 150.

    See incidents

  2. Bitget drove 13% of known reported loss in this period.

    Open incidentSource

  3. Spot Price Manipulation was the most frequently recorded attack method, appearing in 16 incidents.

    Open incident

Attack methods

  1. Spot Price Manipulation16
  2. Incorrect Share Accounting12
  3. Improper Access Control11
  4. Phishing8
  5. Private Key Compromised8
  6. Access Control7
  7. Arithmetic Error6
  8. Swap Logic Flaw6
  1. Access Control / Hot Wallet Key Compromised$403.7M
  2. Phishing$360.5M
  3. Other / Unbacked Cross-Chain Mint$323.1M
  4. Access Control / Compromised Admin + Fake Token Price Manipulation / Proxy Upgrade Hijack$295.0M
  5. Access Control / Cross-Chain Message Spoofing$293.0M
  6. Composable Stable Pools Exploit / Access Control / Rounding Error$128.0M
  7. Oracle Issue / Donation Attack$124.5M
  8. Other / Weak Key Generation$116.0M

Affected sectors

207 uncategorized incidents excluded

  1. DeFi applications112
  2. Other17
  3. Bridges14
  4. Centralized services4
  5. Wallets2
  1. DeFi applications$714.0M
  2. Centralized services$389.0M
  3. Other$108.1M
  4. Bridges$59.5M
  5. Wallets$8.6M

Affected chains

38 unnamed-chain incidents excluded. Multi-chain counts and losses overlap.

  1. Ethereum119
  2. BNB Chain64
  3. Base37
  4. Arbitrum29
  5. Solana19
  6. Polygon17
  7. Tron7
  8. Bitcoin7
  9. Sui6
  10. Optimism5
  1. Ethereum$1.13B
  2. Arbitrum$503.4M
  3. Tron$428.0M
  4. Solana$424.0M
  5. zcash$387.0M
  6. XRP$387.0M
  7. liquid$320.0M
  8. Base$203.0M
  9. Bitcoin$144.9M
  10. Polygon$136.0M

Incidents behind this view

356 matching records

Full incident database
DateIncident and attack methodChainReported lossEvidence
23 Jul 2026Verus-Ethereum BridgeForged Proof / Otherverus$7.5MSource
23 Jul 2026LienBond Group Validation FlawEthereum$542KSource
23 Jul 2026Solido CashOracle Issue / Oracle Misconfigurationsupra$900KSource
23 Jul 2026B² NetworkAccess ControlNot recorded$3.8MSource
22 Jul 2026ZilliqaBiased Schnorr Nonce / Private Key Recoveryzilliqa$1.6MSource
22 Jul 2026AFXAccess Control / Validator Key CompromisedArbitrum$24.1MSource
21 Jul 202642DAOSpot Price / Oracle Manipulation with Instant LiquidationBNB Chain$912KSource
21 Jul 2026FlashTradeMissing Input ValidationSolana$98KSource
21 Jul 2026WanchainOther / Signature Verification FlawCardano$10.0MSource
19 Jul 2026AllbridgeFlash Loan Attack / Withdrawal Logic FlawSolana$1.6MSource
17 Jul 2026FlyCowIncorrect Share AccountingBNB Chain$65KSource
17 Jul 2026AcrossOther / Spoofed Event LogSolana$4.5MSource
16 Jul 2026CrowdRingCircleIncorrect Share AccountingBNB Chain$209KSource
16 Jul 2026DeFiTunaOther / Swap Logic FlawSolana$580KSource
15 Jul 2026Sonic ICPWithdrawal Logic Flawicp$276K
15 Jul 2026Sonic DEXUnknownNot recordedUnknown
15 Jul 2026BarnBridgeMalicious ProposalEthereum$777KSource
15 Jul 2026TeleSwapHot Wallet Key CompromisedBitcoin$735KSource
15 Jul 2026CascadeMark Price ManipulationArbitrum$1.3MSource
15 Jul 2026OstiumOracle Issue / Private Key CompromisedArbitrum$23.8MSource
14 Jul 2026Drips NetworkArithmetic ErrorEthereum$25KSource
13 Jul 2026Chi ProtocolRedeem Logic Flaw / Peg Check BypassEthereum$8KSource
13 Jul 2026Lumi FinanceOther / Signature Verification FlawArbitrum$270KSource
12 Jul 2026PHXIncorrect Share AccountingBNB Chain$90KSource
11 Jul 2026BlueMove DEXReserve Desynchronization / Incorrect Share AccountingSui$529KSource

About these numbers

Updated 31 Oct 2026, 05:22 UTC

Incident selection

This dashboard covers reported incidents, not every attack or the relative safety of a chain. Each verified canonical incident is counted once. Unverified, rejected, merged duplicate, pending-review, and future-dated records are excluded. Late reports and corrections can change recent periods.

Loss and outliers

Reported loss sums known positive USD amounts. Missing amounts stay unknown, not zero. Median incident loss uses only incidents with a known amount. “Exclude the largest incident” removes the largest known-loss event from both the selected and comparison periods.

Missing classifications

Sector and chain labels come from the incident record. Uncategorized incidents are excluded from sector charts; incidents without a named chain are excluded from chain charts. A multi-chain incident appears under each named chain, so those counts overlap.

Limitations

Reliable malicious-actor attribution is not consistently available, so this page does not rank actor groups. Timing alone cannot show that AI caused an attack, so there is no AI-involvement metric. Confirmed returned funds are too sparsely documented for a recovery trend: 2 of 356 incidents in this view have comparable reviewed accounting, totaling $1.9M.

Cite this view

Smart Contract Hacking (SCH), “Web3 Security Trends: 2025-10-01 to 2026-09-30,” method 2026-09-15.1, view d3093a3f2713, accessed 31 October 2026. https://smartcontractshacking.com/tools/web3-security-trends?page=5

Live view. Figures may change as incident records are updated.