Why did StablR stablecoins lose their peg?

StablR said attackers exploited its minting system and created millions of unauthorised stablecoins. The incident caused both EURR and USDR to lose their intended price pegs against the euro and US dollar.

How much was stolen in the StablR exploit?

Blockchain security firm Blockaid estimated the attacker extracted about $2.8 million worth of Ether. The attacker reportedly minted over $10 million in fake stablecoins but recovered less value because of weak liquidity conditions.

What caused the StablR hack?

Blockaid said the exploit was likely caused by a compromised private key linked to a multisignature wallet used for minting tokens. The attacker reportedly gained control of the wallet and replaced existing signers.

What are EURR and USDR?

EURR and USDR are regulated stablecoins issued by StablR and designed to maintain fixed values against the euro and US dollar.

How far did the StablR stablecoins fall from their pegs?

EURR reportedly fell about 23% to roughly $0.88, while USDR dropped to around $0.70. Stablecoin depegs often happen when markets lose confidence in reserves or token integrity after security incidents.

Why did the attacker only recover $2.8 million from $10 million in minted tokens?

The attacker sold the fake tokens through decentralised exchanges with thin liquidity. Large sell orders caused heavy slippage, meaning the market could not absorb the trades near full value.

Why are private key compromises becoming a bigger problem in DeFi?

Private keys control access to crypto wallets and protocol administration systems. If compromised, attackers can mint tokens, drain funds or alter smart contract permissions, making key management one of the biggest security risks in decentralised finance.

How does this exploit affect confidence in stablecoins?

The incident may increase investor concerns around operational security and minting controls at smaller stablecoin issuers. While large regulated stablecoins remain dominant, repeated exploits can damage trust across the wider stablecoin market.

Image for illustrative purposes only. Not a real photo.

StablR stablecoins depeg after $2.8M exploit

Written by Heidi Cuthbert Published May. 25 2026

StablR said it suffered an exploit that caused its euro and US dollar stablecoins to lose their pegs after attackers minted millions of unauthorised tokens.

Blockchain security firm Blockaid said the exploit had extracted about $2.8 million and was likely caused by a compromised private key belonging to one of the owners of a multisignature wallet used for minting stablecoins.

Blockaid said the attacker added themselves to the multisig wallet, replaced the other owners and minted 8.35 million USDR tokens along with 4.5 million EURR tokens before swapping them through decentralised exchanges.

The attacker reportedly exchanged the newly minted tokens worth roughly $10.4 million for around 1,115 Ether, or about $2.8 million, as thin liquidity significantly reduced realised proceeds during the swaps.

EURR, which has a market capitalisation of about $14 million, fell 23% from its peg to roughly $0.88, while USDR, valued at around $11 million, dropped to approximately $0.70.

StablR said it had identified the exploit and was “working to contain it and minimise impact” as concerns around private key security continue rising across decentralised finance markets.

The incident adds to a growing list of crypto exploits this month affecting protocols including THORChain, Verus Bridge, Echo Protocol and Polymarket, with compromised admin and private keys becoming an increasingly common attack vector.

The exploit also places additional attention on StablR after Tether invested in the company in December 2024 as competition intensifies across the regulated stablecoin sector.