Arbitrum (Offchain Labs)

Blockaid found Ethereum remained the hardest-hit blockchain in H1 2026, while Solana replaced Arbitrum as the network with the second-highest losses, driven largely by key compromises.

Blockaid said an attacker drained about $450,000 in USDT from Garden Finance’s HTLC contracts across Ethereum, Base, Arbitrum and BNB Smart Chain.

The exploit hit a custody bridge AFX operates rather than the Arbitrum network itself, with the stolen funds quickly moved to Ethereum.

Security firms said the attacker used enough hot-validator signatures to approve a 24.15 million USDC withdrawal, while Arbitrum said its native bridge was not affected.

Offchain Labs said the incident involved a third-party protocol and did not affect Arbitrum’s native bridge infrastructure.

PeckShield flagged that the attacker bridged the stolen funds from Arbitrum to Ethereum and swapped them for 12,467 ETH.

The brokerage’s blockchain strategy, including tokenized equities and its Arbitrum-based Robinhood Chain, could reduce its reliance on traditional crypto trading, analysts said.

Hackers manipulated Ostium's price feed by compromising an oracle signer key, allowing them to drain roughly $18 million from the Arbitrum-based perpetuals exchange.

Robinhood Chain is an Ethereum layer-2 network built with Arbitrum technology for tokenized assets, crypto apps, and on-chain financial products.

The brokerage's new blockchain is off to a fast start, with memecoin trading boosting activity and revenue flowing back to the Arbitrum ecosystem.

“The security risk is the part we take most seriously,” the team said, citing old code and AI exploit risks.

Brokerage and crypto exchange Robinhood opened the public mainnet for its Arbitrum-powered Ethereum layer-2 network on Wednesday.

Robinhood Chain, a Layer 2 built using Arbitrum's tech stack, went live on public mainnet, with partners including Uniswap from day one.

The South Korean tech giant built a custom layer-2 network with Arbitrum for an advertising platform set to launch this year.

LG Electronics has built a blockchain-based advertising platform with the help of Arbitrum.

LG is building a blockchain focused on buying and selling ads, joining a wave of companies launching their own blockchains in recent years.

LG’s new Arbitrum-based blockchain will serve as a platform for placing, buying, selling, and managing digital ads.

The Kelp DAO exploiter laundered about $220 million worth of remaining stolen funds in a bid to make them untraceable, excluding the $71 million frozen by Arbitrum’s Security Council.

Cash App users can now transfer on Solana, Ethereum, Polygon and Arbitrum, but executive Miles Suter says the firm is still bitcoin-focused.

The attacker minted 5.4 trillion vsdCRV on Arbitrum and is actively swapping tokens for ether, the researchers said.

The Ethereum rollup market is dominated by Arbitrum and Base, which have a combined 68% market share, according to L2Beat.

Variational is positioning itself as a retail-friendly brokerage via its in-development Omni app, which will offer "zero-fee" trading.

Charles Gerstein wants a federal judge to order Tether to transfer OFAC-frozen USDT tied to Iran’s Revolutionary Guard to victims holding unpaid terrorism judgments

Kelp DAO has burned the exploiter’s tokens and outlined a two-week plan to refill rsETH through Aave’s Recovery Guardian multisig wallet.

Arbitrum delegates begin the binding governance process to transfer disputed exploit funds to Aave, while North Korean terrorism creditors continue fighting for ownership in Manhattan court

The order shields anyone who votes on the transfer from being held in violation of the freeze, though the ultimate fate of the funds remains unclear.

A Manhattan judge modified a restraining notice to let Arbitrum DAO move $71 million in frozen Ether to Aave, while preserving terrorism victims’ legal claim on the funds.

Judge Margaret Garnett allowed frozen exploit funds on Arbitrum to move to Aave, but the legal freeze follows the assets as terrorism plaintiffs continue their claim.

Arbitrum DAO voted to release the Kelp exploit funds, but a U.S. Court restraining notice has put the approved transfer in legal jeopardy.

DAO delegates approved releasing exploit-frozen ETH to an Aave-led recovery effort, though Arbitrum’s governance rules delay any transfer for at least eight days