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Symbiosis

Sep 10, 2026

$336K
Lost
$336K
Recovered
$0
Net loss
$336K
Unrecovered0% recovered

A BridgeV2 receive transaction on BSC minted approximately 2^62 raw units of syBTC to a fresh attacker-controlled EOA, creating an enormous quantity of unbacked syBTC. 39 WBTC.

The exact flaw that caused BridgeV2 to accept or authorize the malicious receive has not yet been publicly established.

Target
Bridge
Classification
Bridge & Cross-Chain
Technique
Unbacked Cross-Chain Mint
Attribution
Unknown
Chains
BSCEthereum

Event timeline

  1. Sep 10, 2026
    Exploit executed — $336K drained via unbacked cross-chain mint
  2. Attributed to Unknown
  3. Recovery status Unrecovered 0%

Data credits

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