Taiko Halts Ethereum L2 Block Production After $1.7 Million Bridge Exploit

• Taiko confirmed compromise of its chain state verification mechanism, rendering bridge security assumptions unreliable.
• Attacker drained approximately $1.7 million from the ERC20 Vault on Ethereum via forged proofs.
• Project halted all block production and urged users to withdraw funds from all bridges immediately.
• TAIKO token dived around 10% following the incident.

Ethereum Layer 2 scaling solution Taiko has taken its network offline after a security incident compromised its bridge infrastructure, marking the latest high-profile exploit in the DeFi space.

The project announced on X that it had confirmed a compromise of Taiko’s chain state verification mechanism. As a result, “the security assumptions of all bridges deployed on Taiko can no longer be relied upon.” The team strongly advised all users to withdraw funds from bridges immediately while coordinating with its Security Council.

Blockchain security firm Blockaid first flagged the ongoing exploit targeting Taiko’s ERC20 Vault on Ethereum. The attacker forged message proofs that were accepted on Ethereum L1 without corresponding legitimate events on the Taiko source chain, allowing unauthorized asset withdrawals estimated at $1.7 million, including significant amounts of USDC, ETH, and TAIKO tokens.

In response, Taiko halted all block production to contain the damage. The team paused affected contracts, including the L1 Bridge and ERC20 Vault, and requested centralized exchanges to suspend TAIKO deposits. Subsequent updates indicated the exploit was contained, with no further losses reported.

The incident comes amid a broader wave of exploits, with over 20 crypto hacks recorded in June 2026 alone. Taiko, which positions itself as a decentralized, Ethereum-equivalent rollup using zk-proofs, had launched its mainnet relatively recently. The exploit highlights persistent challenges in bridge security and proof verification systems across Layer 2 solutions.

TAIKO token reacted sharply, dropping approximately 10% in the hours following the announcement, trading near lows around $0.075-$0.08. Stolen assets, including roughly 1.99 million TAIKO tokens, were reportedly moved toward exchanges like MEXC.

Taiko has promised a full post-mortem and indicated potential technical and legal actions against the attacker, including address blacklisting. Users with assets on Taiko bridges are advised to act promptly and monitor official channels for recovery updates and reopening timelines.

This event underscores ongoing risks in cross-chain infrastructure even as the broader Ethereum ecosystem matures. While the quick response limited damage compared to larger historical bridge hacks, it serves as a reminder for projects and users to prioritize security assumptions and rapid incident response.

Disclaimer: This article is for informational purposes only and does not constitute advice of any kind. Readers should conduct their own research before making any decisions.

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