Euler Labs: Informed of USR attack incident and urgently disables RLP collateral function

Bitget • March 22, 2026

ChainCatcher news, Euler Labs posted on X stating that they have noticed the unauthorized minting security incident of USR reported by Resolv. The team is actively investigating, and as a precautionary measure, the RLP collateral function in the Euler Yield vault on Arbitrum has been disabled. Euler Earn USDC (Arbitrum) has also stopped allocating funds to Euler Yield.

Euler Labs said that these measures are intended to isolate potential risk exposure. The impact of the incident is still being assessed, and further updates will be disclosed in a timely manner.

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Euler Labs Responds to Unauthorized USR Minting Incident Euler Labs has acknowledged a security incident involving the unauthorized issuance of USR, as reported by Resolv. In response, the company has disabled the RLP collateral functionality in the Euler Yield vault on Arbitrum and halted fund allocation to Euler Earn USDC (Arbitrum). The team is currently investigating the incident to assess its impact and isolate potential risk exposure. Further updates will be provided as more information becomes available. The incident raises concerns about the security of the Euler platform and its collateral management practices. 4 sources 52

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Arbitrum Euler Labs Resolv