Web3 Hacks in 2020

2020 incident records, sorted by known loss. The strongest mapped pattern is Access Control (12 rows); the largest tracked chain bucket is Bitcoin ($3.5B).

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Incident records

Sorted by known reported loss first, then recency. Open the source before treating any summary as final.

Links
1 LuBian $3.5B bitcoin Access Control Attacks Details Source
2 WoToken $1.0B — Rugpull Details Source 1Source 2Source 3
3 KuCoin $285M ethereum Access Control Attacks Details Source
4 Harvest Finance $33.8M ethereum Flash Loan Attacks Details Source
5 Lendf.me $25.2M ethereum Reentrancy Details Source
6 Pickle Finance $19.7M ethereum Other / Vault Swap Exploit / Missing Input Validation Details Source 1Source 2Source 3
7 Eminence $15.1M ethereum Flash Loan Attacks Details Source
8 Electrum $15.0M — Access Control Attacks Details Source
9 Compounder Finance $12.5M ethereum Drained Contracts / Rugpull / Admin Drain Details Source
10 EXMO $11.7M multiple Access Control Attacks Details Source
11 SharkTron $10.0M — Rugpull Details Source
12 Cover Protocol $9.4M ethereum Incentives Function Mistake / Other / Arithmetic Error Details Source
13 MakerDAO $8.3M ethereum Oracle Manipulation & Price Manipulation Details
14 bZx $8.1M ethereum Self-transfer balance duplication Details Source 1Source 2Source 3
15 Nexus Mutual $8.0M ethereum Key Leaked via Infrastructure Details
16 Origin Protocol $8.0M ethereum Flash Loan Attacks Details Source
17 Warp Protocol $7.8M ethereum Flash Loan Attacks Details Source
18 ValueDefi $7.4M ethereum Flash Loan Attacks Details Source
19 OKEx $5.6M ethereum classic Forged Proof Details
20 ETERBASE $5.4M algorand, bitcoin, ethereum, tezos, tron, xrp Access Control Attacks Details Source 1Source 2Source 3
21 Aeternity $5.2M aeternity Validator Key Compromised Details
22 Livecoin $3.3M multiple API Key Compromised Details
23 Cheese Bank $3.3M ethereum Flash Loan Attacks Details Source 1Source 2
24 Cashaa $3.1M bitcoin Access Control Attacks Details Source 1Source 2Source 3
25 IOTA wallet $2.9M — Other Details Source 1Source 2
26 EtherCrash $2.5M ethereum Hot Wallet Key Compromised Details
27 Emerald Mine $2.5M eos Rugpull Details Source
28 Trinity Wallet $2.4M iota Cloudflare Key Compromised / CDN Compromise Details Source
29 Deriswap $2.2M ethereum Rugpull Details Source
30 Akropolis $2.0M ethereum Flash Loan Attacks Details Source
31 Percent Finance $1.9M — Other Details Source 1Source 2
32 Ledger $1.8M — Access Control Attacks Details Source 1Source 2
33 Ethereum Classic $1.7M ethereum classic Forged Proof Details
34 2gether $1.4M bitcoin, ethereum Rugpull / Key Leaked via Infrastructure Details Source 1Source 2
35 Axion Network $1.1M ethereum Other / Infinite Mint Details Source 1Source 2Source 3
36 Altilly $750K multiple Rugpull / API Key Compromised Details Source
37 Yam DAO $750K — Other Details Source 1Source 2Source 3
38 UniCat.farm $713K ethereum Rugpull Details Source
39 bZx $666K ethereum Flash Loan Attacks Details Source 1Source 2
40 Bancor $545K ethereum Access Control Attacks Details Source
41 Kper Network $542K ethereum Rugpull Details Source
42 Balancer $524K ethereum Flash Loan Attacks Details Source 1Source 2Source 3
43 Pump Farm $478K ethereum Rugpull Details Source 1Source 2
44 Vether $450K ethereum Access Control Attacks Details
45 Coral $420K eos Reentrancy Details
46 DEFIBase $379K ethereum Rugpull Details Source
47 opyn $371K ethereum Other / Withdrawal Logic Flaw Details Source 1Source 2
48 Hype Bet Finance $364K ethereum Rugpull Details Source
49 bZx $356K ethereum Flash Loan Attacks Details Source 1Source 2
50 LV Finance $334K ethereum Rugpull Details Source
51 Altsbit $303K bitcoin, ethereum Other / Key Leaked via Infrastructure Details Source
52 Tomatos $286K ethereum Rugpull Details Source
53 Soft Yearn Finance $281K — Other Details Source 1Source 2
54 Ledger $271K multiple Phishing Attacks Details
55 SYFI $250K ethereum Arithmetic Error Details
56 Bisq $250K bitcoin Other / Withdrawal Logic Flaw Details Source 1Source 2
57 Chainlink $245K — Other Details Source
58 POKeFARM $238K ethereum Rugpull Details Source
59 Uniswap $232K ethereum Reentrancy Details Source 1Source 2
60 Ledger $224K — Access Control Attacks Details Source 1Source 2
61 Tetris Finance $218K — Rugpull Details Source
62 Santa DAO $204K ethereum Rugpull Details Source 1Source 2
63 DistX $198K ethereum Rugpull Details Source
64 Magix $188K ethereum Rugpull Details Source
65 Cover protocol $183K ethereum Rugpull Details
66 KeeperDAO $170K ethereum Honeypot Details
67 Chessfarm.Tech $168K binance Rugpull Details Source
68 Soda Protocol $160K ethereum Withdrawal Logic Flaw Details
69 Walletreum $138K ethereum Rugpull Details Source
70 YFFS Finance $130K ethereum Rugpull Details Source
71 XYearn $130K ethereum Rugpull Details Source
72 Twitter $120K — Access Control Attacks Details Source 1Source 2Source 3Source 4
73 Dark Matter $112K ethereum Rugpull Details
74 Vice.Uno $111K binance Rugpull Details Source
75 Dividend Token $92K ethereum Rugpull Details Source
76 CBDAO $84K ethereum Rugpull Details Source
77 Star Swap $77K ethereum Rugpull Details
78 Exvault Finance $73K ethereum Rugpull Details Source
79 YFFC $72K ethereum Rugpull Details Source
80 Solid Protocol $72K ethereum Rugpull Details Source
81 UniTarget $71K ethereum Rugpull Details Source
82 Bitcoin Gold $70K bitcoin gold Validator Key Compromised Details
83 Kosta Finance $63K ethereum Rugpull Details
84 YFDash $61K ethereum Rugpull Details Source
85 K33pr $61K ethereum Rugpull Details Source
86 RIFT Token $59K — Rugpull Details Source
87 Rapid Set Dollar $48K ethereum Rugpull Details Source
88 Prophet Project $46K ethereum Rugpull Details Source 1Source 2
89 Liquid Core $42K ethereum Rugpull Details Source
90 Leo Finance $42K ethereum Other / Infinite Mint Details Source 1Source 2
91 iProtocol $42K ethereum Rugpull Details Source
92 Solv3 network $36K ethereum Rugpull Details Source 1Source 2
93 Hype Bet $35K ethereum Rugpull Details Source
94 OKO TOKEN $34K ethereum Honeypot Details Source
95 Yearnspace $34K ethereum Rugpull Details Source
96 MTI Finance $32K ethereum Rugpull Details Source
97 AutoTrade Finance $32K ethereum Honeypot Details Source
98 Nemo Finance $32K ethereum Honeypot Details Source
99 Reaper Finance $31K ethereum Rugpull Details Source
100 Apollo Swap $31K ethereum Honeypot Details Source

Notes

Loss totals use parsed USD values only; unknown or unparseable losses are not guessed. Attack-class links are added only when the root cause is clear enough to map.

Full hack database Filter every tracked incident by chain, date, loss size, and technique. Attack class library Move from incident examples to exploit mechanics and review checklists. Largest crypto hacks Compare this year against the highest-loss incidents in the database.