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. 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.
Signal context
First seen: Jun 22, 2026
Last updated: Jul 1, 2026
Status: Public signal
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.
Signal analysis
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Likely country: Location not provided
Watch internet-facing systems, credential abuse and exploit activity.
- Source type: outside the affected organization
Impact area: Confidentiality
- 1 signal in the same sector
- 88 signals with the same likely impact area
- 1 signal linked to this organization/domain
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