CoinDesk
Taiko, the Ethereum layer-2 scaling network, has fully restored its cross-chain bridge just 10 days after a June 22 exploit drained roughly $1.7 million from the bridge and ERC20 Vault contracts. The protocol halted operations after the attack, traced to a compromised SGX signing key mistakenly exposed on GitHub that let an attacker forge withdrawal proofs, then ran a multi-stage recovery covering the vulnerability patch, 1:1 replenishment of bridge reserves, restoration of layer-2 activity, and an independent security review.
The bridge reopened under conservative withdrawal quotas, and Taiko confirmed every affected user has been made whole without a separate claims process. A full post-mortem is expected in the coming days.
Why it matters
Bridge exploits involving exposed signing keys remain a persistent failure mode across crypto, with hundreds of millions lost to similar vectors industry-wide in 2026 alone. Taiko's case lands in the small minority of incidents where recovery happens inside a two-week window and depositors exit with no haircut. The independent review, rather than an internal-only fix, is what gives the restoration credibility to counterparties and to the protocols routing through Taiko.
Market impact
The market read the recovery as validation. TAIKO surged as much as 136% in recent trading, an outsized relief rally reflecting the gap between expectations of a slow, partial reimbursement and the actual full restoration inside ten days. Conservative withdrawal quotas remain in place during the early reopen window to keep stress on the replenished reserves contained while normal user activity ramps back up.
Frequently asked questions
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What happened in the Taiko bridge exploit?
On June 22, an attacker forged withdrawal proofs on Taiko's Ethereum L2 cross-chain bridge using a compromised SGX signing key that had been mistakenly exposed on GitHub, draining roughly $1.7 million from the bridge and ERC20 Vault contracts.
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How did Taiko restore the bridge so quickly?
Taiko ran a multi-stage recovery: patching the vulnerability, replenishing bridge reserves to full 1:1 backing, restoring layer-2 network activity, and submitting the fix to an independent security review. The bridge reopened under conservative withdrawal quotas 10 days after the attack.
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Were all Taiko bridge users made whole?
Yes. Taiko confirmed every affected user was fully reimbursed without a separate claims process. The protocol said it would publish a full post-mortem of the incident in the days following the bridge's reopening.
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Why did the TAIKO token rally after the hack?
TAIKO surged as much as 136% as the market read the swift, full reimbursement and independently reviewed fix as proof that Taiko could contain a key-compromise exploit. Bridge key exposures have cost the sector heavily in 2026, making rapid recoveries rare and credibility-building.
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Are there still limits on the Taiko bridge after reopening?
Yes. The bridge reopened under conservative withdrawal quotas designed to keep stress on the replenished reserves contained while normal user activity ramps back up. Taiko said the limits should not affect normal use.
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