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Crypto DeFi

TENDRIL sell hook exploit causes about $555K net loss

TENDRIL’s Sell Hook flaw let sellers deduct the trading pair’s token balance and sync reserves before the remaining sell input arrived, allowing the delayed input to drain nearly all USDT and cause a net loss of about $555,000, CertiK Alert monitoring shows. The exploit targets the protocol’s sell mechanism.

Original source

AI take

The significance here is structural rather than market-wide: the flaw sits in the ordering of reserve syncing versus settlement in the sell path, a narrow design choice with outsized consequences. It affects TENDRIL's own liquidity providers and anyone relying on its pool reserves as an honest reference, since the drained USDT was real value, not an accounting artifact. The open question is whether other protocols share this sync-before-settlement pattern, and whether TENDRIL's response addresses the mechanism itself rather than the single incident.

Generated by AI for reference only.

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