Incident All ledgers
Syscoin Bridge: $10.0m
Syscoin Bridge lost $10.0m on 7 June 2026. Ranked 193rd of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 7 June 2026
- Lost
- $10.0m
- Returned or repaid
- None recorded
- Target
- DeFi Protocol
- Category
- Bridge & Cross-Chain
- Method
- Forged Proof
- Chains
- Syscoin
The Syscoin Bridge lost about $10 million after a parsing mismatch between Syscoin Core and the NEVM relay let a malformed burn proof with duplicate asset commitments pass as valid. This allowed unauthorized minting of roughly 5 billion SYS tokens.
Against the ledger
- It ranks 193rd of the 1,272 incidents with a known loss, and 28th in 2026.
- It accounts for 11.5% of the $86.9m in known losses in June 2026.
- 56 incidents in the ledger are classified as Bridge & Cross-Chain, for $1.53bn in total. This one is 0.7% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 04 Oct 2021 | pNetwork | $13.0m | DeFi Protocol | Spoofed Event Log | — |
| 17 May 2026 | Verus-Ethereum Bridge | $11.5m | DeFi Protocol | Forged Proof | — |
| 15 May 2026 | THORChain DEX | $10.7m | Chain | Bridge Logic Flaw | — |
| 01 Jan 2025 | NoOnes | $7.9m | DeFi Protocol | Cross-Chain Message Spoofing | — |
| 22 Jul 2026 | Verus-Ethereum Bridge | $7.5m | DeFi Protocol | Forged Proof | — |
All failures in 2026 · The failures ledger
Amounts are DefiLlama’s estimates and can change as incidents are revalued. Its returned figure can include money a company repaid itself, not only funds recovered from attackers. Source: DefiLlama.
Cite this Bitminer.io, “Syscoin Bridge, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/syscoin-bridge-2026-06-07/. How this is built