Key Highlights
- Taiko confirmed users will not lose funds from the June 21 exploit.
- The bridge remains undercollateralized but will be restored to a 1:1 backing ratio before reopening.
- Attackers exploited flaws in Taiko’s chain state verification mechanism.
Taiko, an Ethereum layer-2 scaling solution, has issued a detailed update regarding the security incident that occurred on June 21, emphasizing that no user funds will be lost as a result of the breach.
In an X post on Wednesday, the team said that while the Taiko Bridge remains undercollateralized following the incident, it is committed to fully restoring 1:1 collateralization before reopening. This would ensure that all user balances remain fully backed and restored to their pre-incident state.
“We took careful, deliberate steps from the start: containing the incident, identifying how it happened, and working with our board on the right way to protect users,” the team stated. These measures appear to have successfully prevented any direct loss to the community.
CEO files formal report with authorities
Taiko said its CEO has filed a formal report with Singapore authorities and that the project pledged its full cooperation in investigating and pursuing those responsible for the attack. The company is currently in the testing phase of necessary repairs and expects to safely reopen the chain and bridge in the near future.
The incident comes amid a broader wave of security breaches across the crypto industry, highlighting ongoing risks associated with DeFi infrastructure and cross-chain bridges. Taiko stressed the importance of vigilance against scams. “We’ll never DM you first, and there’s no claim or refund site,” the team warned. Any unsolicited messages or fake recovery websites should be ignored and reported.
How did the attack unfold
On June 21, 2026, Taiko suffered a bridge exploit after attackers exploited a flaw in the chain state verification mechanism, specifically in source-signal proof validation.
By forging invalid message proofs, the hacker was able to register fraudulent withdrawals and drain approximately $1.7 million from Taiko’s ERC20 Vault on Ethereum. The stolen assets included around 870 ETH and nearly 2 million TAIKO tokens.
Taiko’s team responded swiftly by halting block production and pausing the bridge. They contained the incident within hours and publicly confirmed the compromise, advising users to withdraw funds from bridges as a precaution.
Market awaits detailed post-mortem
As testing continues, the crypto community will be watching closely for the reopening timeline and the detailed post-mortem. For now, users are advised to remain patient, avoid interacting with any unofficial links or accounts, and monitor only verified Taiko channels for updates.
The full technical post-mortem is anticipated to provide valuable insights for other projects and developers working on bridge security. The incident adds to ongoing concerns regarding bridge security in the layer-2 ecosystem. Such events can lead to short-term price pressure and reduced confidence.
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