Shibarium Bridge Flash Loan Exploit (September 2026)
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anchored·dwfAAd…nf3VSummary
The Shibarium bridge — connecting Shiba Inu's Layer 2 network to Ethereum — suffered a sophisticated flash loan and validator compromise attack in which approximately 224.57 ETH and 92.6 billion SHIB tokens, collectively valued at roughly $2.4 million, were drained from bridge contracts. The attacker borrowed 4.6 million BONE governance tokens via flash loan to seize a two-thirds validator supermajority on Shibarium's Heimdall consensus layer, then injected fraudulent checkpoints to authorize unauthorized withdrawals. Developers paused bridge functions, rotated all validator keys, recovered the 4.6 million BONE from the attacker's contract, and prepared a phased user refund plan.
Connected Entities
1 entityNo connected entities recorded yet — this investigation is not currently linked to any other page in the index.
Timeline(8 events)
12 September 2025
Attack executed at approximately 18:44 UTC. Attacker acquired 4.6M BONE via flash loan, delegated to Ryoshi Validator 1, seized 10-of-12 validator signing majority, injected fraudulent Heimdall checkpoints, and drained 224.57 ETH and 92.6B SHIB from the bridge.
Shibtoken on X / crypto.news / The Block12 September 2025
Developers paused staking and unstaking, freezing attacker's BONE. Transferred stake manager funds to 6-of-9 multisig. Revoked bridge predicate and root chain manager access.
The Shib Daily13 September 2025
Developer Kaal Dhairya posted public security update describing the attack as 'sophisticated' and 'probably planned for months.' Hexens, Seal 911, and PeckShield engaged for forensic investigation.
Kaal Dhairya on X13 September 2025
BONE price surged approximately 40% on news of network pause before correcting. SHIB rose 4.5% in the same 24-hour window.
CoinDesk16 September 2025
Shib team offered 50 ETH bounty to attacker for return of stolen funds, pledging no criminal prosecution. Attacker transferred assets without responding.
The Shib Daily17 September 2025
Official community update published by @Shibtoken, confirming root cause hypothesis (KMS or developer machine key compromise), detailing bridge contract access revocations, and outlining ongoing forensics.
Shibtoken on X3 October 2025
CoinCentral reports 4.6M BONE tokens recovered from attacker's staking contract via corrected unbonding process. All validator keys confirmed rotated. Over 100 ecosystem contracts migrated to secure wallets.
CoinCentral14 October 2025
BONE Plasma Bridge reactivated with enhanced security measures: address blacklisting, 7-day withdrawal delay, 30-checkpoint withdrawal extension. Hexens completed independent audit of updated contracts.
The Shib DailyDecision Log
- hash: 6ucoLSHSzMEdcqH3ntewbwCJ1bL2tBv33eV8ByxXtHCE
This investigation is cryptographically anchored to the Solana blockchain (1 event). 16 of 24 cited source URLs have an Internet Archive snapshot.
model: claude-sonnet-4-6
generated: 9/29/2026, 12:09:40 PM
last updated: 9/29/2026, 5:10:54 PM
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