Taiko Ethereum L2 Bridge Exploited for $1.7 Million Due to Leaked SGX Signing Key
On June 22, 2026, Taiko, an Ethereum Layer-2 network, suffered an exploit on its bridge, resulting in approximately $1.7 million in losses.
Key points
- Taiko's Ethereum L2 bridge was exploited on June 22, 2026.
- Approximately $1.7 million in assets were stolen.
- The cause was a leaked SGX signing key for the Raiko prover, found on GitHub.
Connected intelligence
Signal brief
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Organization
- Published
- Jun 22, 2026
- Updated
- Jul 1, 2026
- Confidence
- High
- Evidence
- 1 source
Structured assessment
Signal analysis
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Threat source
Watch internet-facing systems, credential abuse and exploit activity.
Business impact
- Impact area
- Unknown
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
On June 22, 2026, Taiko, an Ethereum Layer-2 network, suffered an exploit on its bridge, resulting in approximately $1.7 million in losses. The attack was caused by an SGX signing key for Taiko's Raiko prover being accidentally committed to a public GitHub repository. This leaked key allowed an attacker to register a malicious prover and forge fraudulent withdrawal proofs, enabling them to drain assets from the L1 bridge contracts. Taiko halted block production and urged users to withdraw funds from all bridges.
When was this signal reported?
Shadow Tier lists Jun 22, 2026 as the signal date.
Which organization is connected to this signal?
Taiko is the organization connected to this public signal.
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