Web3 Security Trends

Updated 15 Sep 2026About these numbers
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01 Sep 2025–31 Aug 2026compared with 01 Sep 2024–31 Aug 2025
Reported loss$2.72B ↓ 71% vs prior period 347/354 loss amounts reported
Reported attacks354 ↑ 55% vs prior period
Median incident loss$679K ↑ 3% vs prior period

Attacks and losses over time

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Reported loss and attack counts from 2025-09-01 to 2026-08-31.Reported loss (USD)Attack count $0 $500M $1B 0 25 50 Sep 2025: $176.5M reported loss; 22 attacksSep 2025Oct 2025: $51.6M reported loss; 15 attacksOct 2025Nov 2025: $288.4M reported loss; 18 attacksNov 2025Dec 2025: $79.5M reported loss; 20 attacksDec 2025Jan 2026: $405.4M reported loss; 30 attacksJan 2026Feb 2026: $36.8M reported loss; 14 attacksFeb 2026Mar 2026: $77.8M reported loss; 30 attacksMar 2026Apr 2026: $951.7M reported loss; 39 attacksApr 2026May 2026: $112.5M reported loss; 50 attacksMay 2026Jun 2026: $93.9M reported loss; 41 attacksJun 2026Jul 2026: $299.4M reported loss; 42 attacksJul 2026Aug 2026: $145.2M reported loss; 33 attacksAug 2026

Top 5 incidents: 47% of loss

View chart as a table
PeriodReported lossAttacksKnown amounts
Sep 2025$176.5M2222 of 22
Oct 2025$51.6M1515 of 15
Nov 2025$288.4M1818 of 18
Dec 2025$79.5M2020 of 20
Jan 2026$405.4M3030 of 30
Feb 2026$36.8M1414 of 14
Mar 2026$77.8M3028 of 30
Apr 2026$951.7M3938 of 39
May 2026$112.5M5050 of 50
Jun 2026$93.9M4141 of 41
Jul 2026$299.4M4242 of 42
Aug 2026$145.2M3329 of 33

What changed

  1. Compared with the previous period, reported loss fell by $6.50B while incident count rose by 125.

    See incidents

  2. Drift Trade drove 11% of known reported loss in this period.

    Open incidentSource

  3. Incorrect Share Accounting was the most frequently recorded attack method, appearing in 14 incidents.

    Open incidentSource

Attack methods

  1. Incorrect Share Accounting14
  2. Access Control13
  3. Spot Price Manipulation13
  4. Improper Access Control11
  5. Phishing7
  6. Forged Proof6
  7. Oracle Issue6
  8. Private Key Compromised6
  1. Phishing$372.9M
  2. Access Control$352.0M
  3. Compromised Admin + Fake Token Price Manipulation / Proxy Upgrade Hijack$295.0M
  4. Access Control / Cross-Chain Message Spoofing$293.0M
  5. Other / Weak Key Generation$130.0M
  6. Composable Stable Pools Exploit / Access Control / Rounding Error$128.0M
  7. Oracle Issue / Donation Attack$75.0M
  8. Delegatecall Exploit / Access Control / Delegatecall Hijack$48.0M

Affected sectors

200 uncategorized incidents excluded

  1. DeFi applications115
  2. Other21
  3. Bridges12
  4. Centralized services4
  5. Wallets2
  1. DeFi applications$788.7M
  2. Other$167.5M
  3. Bridges$60.1M
  4. Centralized services$43.5M
  5. Wallets$8.6M

Affected chains

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

  1. Ethereum102
  2. BNB Chain61
  3. Base35
  4. Arbitrum33
  5. Solana20
  6. Polygon14
  7. Bitcoin7
  8. Sui6
  9. Avalanche6
  10. Optimism4
  1. Ethereum$849.4M
  2. Arbitrum$555.7M
  3. Solana$474.1M
  4. Base$204.8M
  5. Bitcoin$176.5M
  6. Polygon$134.2M
  7. Optimism$130.2M
  8. Sonic$128.1M
  9. BNB Chain$96.4M
  10. Cronos$75.0M

Incidents behind this view

50 matching records · 2026-05 selected · Clear selection

Full incident database
DateIncident and attack methodChainReported lossEvidence
31 May 2026AROSSpot Price ManipulationBNB Chain$295K
31 May 2026Fluid LendingKey Leaked via InfrastructureEthereum$215K
30 May 2026AFI ProtocolUnknownEthereum$480K
30 May 2026AlephiumOther / Forged ProofEthereum$815KSource
30 May 2026Gravity BridgeAccess Control / Validator Key CompromisedEthereum$5.4MSource
29 May 2026MoneyMonOtherNot recorded$85KSource
28 May 2026DxSaleLiquidity RugBNB Chain$7.3M
28 May 2026ONTROwnership TakeoverEthereum$98K
27 May 2026SUPERFORTUNE AIImproper Access ControlEthereum$15.2M
27 May 2026Stake DAOAccess Control / Deployer Key CompromisedArbitrum$91KSource
26 May 2026SKPIncorrect Share AccountingBNB Chain$212K
25 May 2026BitmorToken Approval AbuseBase$6K
25 May 2026New Market TradingImproper Access ControlArbitrum, Base, Ethereum$4.0MSource
25 May 2026WUSD.fiFlash Loan Attack / Reward Logic FlawEthereum$207KSource
25 May 2026Third-party SquidRouterModuleAccess ControlNot recorded$3.2MSource
24 May 2026Fractal ProtocolReentrancyArbitrum$14K
24 May 2026StablRAccess ControlNot recorded$12.8MSource
23 May 2026StablRPrivate Key CompromisedEthereum$2.8M
23 May 2026MureSignature Verification FlawEthereum$12K
22 May 2026PolymarketPrivate Key CompromisedPolygon$700K
20 May 2026MAP ProtocolInfinite MintBNB Chain, Ethereum$110K
20 May 2026RetoSwapOther / Missing Input Validation / Malicious Proposalmonero$2.7MSource
20 May 2026HermesVaultOther / Withdrawal Logic FlawAlgorand$30KSource
19 May 2026ElevateFiSpot Price ManipulationPolygon$16K
19 May 2026BankrSession Key CompromisedBase$170K

About these numbers

Updated 15 Sep 2026, 22:42 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 354 incidents in this view have comparable reviewed accounting, totaling $1.9M.

Cite this view

Smart Contract Hacking (SCH), “Web3 Security Trends: 2025-09-01 to 2026-08-31,” method 2026-09-15.1, view 4877e750d4f5, accessed 15 September 2026. https://smartcontractshacking.com/tools/web3-security-trends?bucket=2026-05&page=1

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