---
title: "Across Protocol Reports Relayer Security Incident and Limits Losses to Under $4 Million"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/293809931.md"
description: "Across Protocol reported a relayer security incident where an attacker exploited off-chain software on Solana to forge $41.7M in fake deposits. Relayer advanced ~$4.5M before services paused; remaining deposits were invalidated. Net losses are under $4M, limited to Risk Labs' capital. No smart contract vulnerabilities were involved, and user funds were safe or refunded. Solana order flow is now routed via CCTP."
datetime: "2026-07-25T02:33:40.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/293809931.md)
  - [en](https://longbridge.com/en/news/293809931.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/293809931.md)
generator: "portal-rs"
---

# Across Protocol Reports Relayer Security Incident and Limits Losses to Under $4 Million

Across Protocol has released a postmortem on a Relayer security incident. According to Foresight News, an attacker exploited a vulnerability in Risk Labs' off-chain event-reading software on Solana and forged 1,627 fake deposit events with a total face value of about $41.7 million. Relayer completed 581 advance payments before Solana services were paused, involving about $4.5 million in its own funds. The remaining fake deposits, totaling about $37 million, were invalidated. The incident did not involve a smart contract vulnerability, and all user transfers were completed the same day or fully refunded. The loss was limited to Risk Labs' own relayer capital, with about $4.5 million funded and net losses below $4 million after offsetting about $500,000 from the attacker. Solana order flow has now been routed entirely through CCTP, and the ACX token buyback plan remains unchanged.

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---
> **Disclaimer: This article is for reference only and does not constitute any investment advice.**