BounceBit exploit size disputed as reports peg value at $286.5M or $3.1M

Reports differ sharply on the dollar value of the BounceBit exploit involving roughly 286 million BB tokens. CryptoBriefing and Coinfomania put losses at $286.5 million, while Protos estimates the same token movement at just over $3.1 million. On the core facts, coverage is broadly aligned: BounceBit will shut down its L1 network, BounceBit Chain, and reissue BB as BEP20 tokens on BNB Chain. The incident was traced to an authorization flaw in a native Evmos module used by BounceBit Chain. Attackers were able to move about 286 million BB tokens out of nine accounts without authorization. BounceBit plans to base the reissue on a pre-exploit snapshot, excluding the attacker's tokens. The company's CeDeFi, Prime, and RWA products were reported as not affected. The disagreement centers on pricing at the time of the transfers. CryptoBriefing's Aug. 21, 2026 report (15:19) described an attacker moving $286.5 million worth of BB from mainnet accounts. Coinfomania's Aug. 21, 2026 item (15:47) said hackers exploited an authorization vulnerability and stole over $3.1 million in BB. Protos (Aug. 21, 2026, 17:15) similarly valued the 286 million BB token movement at a little above $3.1 million. A definitive figure would likely require BounceBit's official postmortem or on-chain analysis confirming BB's market price at the time of the transfers. Update (21 Aug 2026, 17:29 UTC): The Block reported that BounceBit intends to sunset its native blockchain and migrate operations to BNB Chain following the exploit, and added that the attacker moved approximately 286.5 million BB tokens from nine separate wallets before block production was eventually halted. The Block's framing aligns with the lower, roughly $3 million, valuation. Originally reported by AltcoinGordon; written by Noah Sullivan; republished with permission.