Security incident · 2026-04-13
MONA
According to the public DefiLlama incident dataset, MONA (BSC) suffered a security incident on 2026-04-13, with about $61K reported lost.
| Date | 2026-04-13 |
|---|---|
| Reported loss | $61K |
| Chain | BSC |
| Target type | Token |
| Technique class | Token & Share Accounting |
| Technique | Incorrect Share Accounting |
| Bridge incident | No |
| Within 2026 | #242 by loss that year, 0.0% of all reported losses that year |
How this kind of attack works
The contract's bookkeeping was wrong, for example the conversion between shares and assets, so the attacker redeemed far more than they put in.
Would a pre-payment check have helped
Accounting and share-math bugs are contract-layer problems for code audits.
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