Fogo, a high-speed Layer 1 blockchain, halted its mainnet after an attacker received 400 million FOGO tokens in a security incident involving the Fogo Foundation. The haul represented more than 10% of the token’s circulating supply and was worth roughly $3 million when the incident emerged.
The foundation initially said an unknown actor had compromised its organization and transferred the tokens to a bad actor. It said the blockchain itself continued operating normally. However, about 15 hours later, Fogo paused the mainnet to prevent further movement of the affected assets.
Emergency Network Halt
Fogo said validators would upgrade the network to restrict addresses linked to the unauthorized activity. The project did not provide a restart timeline or explain exactly how the address restrictions would work.
The 400 million FOGO tokens equal about 4% of Fogo’s 10 billion-token genesis supply. However, their share of the circulating supply makes the incident particularly significant for the token market.
- The attacker received 400 million FOGO tokens.
- The amount represents more than 10% of circulating supply.
- The tokens represented about 4% of the 10 billion-token genesis supply.
- The estimated value was around $3 million at the time of the incident.
Exchange Restrictions Add Pressure
Major exchanges also moved to limit FOGO transfers. Bitget suspended FOGO deposits and withdrawals shortly before Fogo publicly disclosed the incident. KuCoin later announced similar restrictions.
The exchange suspensions could make it harder for the attacker to liquidate the tokens through centralized venues. They also temporarily restrict ordinary users from transferring FOGO through those platforms.
Fogo has not disclosed the attack vector, the specific systems affected, or whether private keys were compromised. The foundation said it had notified exchanges, law enforcement agencies and forensic specialists.
Fogo launched its mainnet in January following a $7 million Binance token sale at a $350 million valuation. The project positions itself as a high-performance blockchain for onchain trading, with a focus on fast block times and reduced exposure to maximal extractable value.
The mainnet halt now places Fogo’s security controls and validator governance under scrutiny. Investors will be watching for details about the compromise, the treatment of the affected tokens and the timing of the network’s restart.
