Hyperdrive HL Hack

TOTAL LOST $782K
Low Router Exploit / Other hyperliquid l1

Summarize with AI

ChatGPT Perplexity Claude Grok
Affected Chain hyperliquid l1 Incident surface
Recovered - No recovery reported
All-Time Rank #891 By amount stolen
Auditors 1 Prior security audit

Incident Overview

Quick Summary

On September 28, 2025, Hyperdrive, a lending protocol on the Hyperliquid blockchain, lost approximately $782,000 after an attacker exploited a smart contract vulnerability. The breach targeted two key liquidity pools, draining 673,000 USDT0 and 110,244 thBILL tokens, marking the third major security incident on the Hyperliquid ecosystem in 2025.

Details of the Exploit

The attacker exploited an "arbitrary call in the router" vulnerability within Hyperdrive's smart contract system, allowing unauthorized access to funds from the Primary USDT0 Market and Treasury USDT Market pools. Through repeated exploitation of this flaw, the attacker drained 672,934 USDT0 stablecoins and 110,244 thBILL tokens. The stolen assets were subsequently converted to BNB and ETH before being moved off-chain.

Hyperdrive immediately paused all markets and suspended withdrawals to prevent further malicious activity while working with security and forensics experts to investigate. The team confirmed the root cause has been identified and resolved, and is developing a compensation plan for affected users along with a comprehensive postmortem report.

Incident Report

Protocol / Project Hyperdrive HL
Date of Incident
Affected Chain(s) hyperliquid l1
Attack Technique Router Exploit / Other
Classification Protocol Logic / Borrowing and Lending
Primary Source View Post-Mortem

Protocol Information

Protocol Type Lending
Smart Contract Language Solidity
Official Website hyperdrive.fi/
Protocol Twitter/X @hyperdrivedefi
Team Anonymous
Source Code Unverified

What the Attacker Needed to Succeed

Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.

Technical Knowledge Deep understanding of router exploit / other and Solidity and EVM internals
Capital Required Seed capital to cover gas and initial position setup
On-Chain Access Ability to interact with hyperliquid l1 smart contracts and deploy a custom exploit contract
Protocol Analysis Identification of the exploitable vulnerability in Hyperdrive HL's contract logic - root cause: protocol logic / borrowing and lending
Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single atomic block
Obfuscation Plan A strategy to launder and move stolen funds - typically through mixers, cross-chain bridges, or decentralized DEX swaps to resist tracing

What Auditors Should Check

Could this have been caught in audit? Likely — with a thorough Router Exploit / Other audit checklist and test coverage
Audited by Audit Report 1 — still lost $782K. Prior audits don't guarantee safety, especially after post-audit code changes.

If you're auditing a protocol with similar architecture to Hyperdrive HL, these are the critical security checks that could have prevented this incident (September 2025).

  • Verify all logic paths related to Router Exploit / Other are guarded by proper access controls and input validation
  • Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs

Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.

Free Trial

Security Audit History

Sources & References

Browse all hacks

These hacks used the same attack technique. Understanding the pattern helps prevent future exploits.

Rubic $1.4M
Router Exploit / Other

Learn to Prevent the Next Hyperdrive HL

The Hyperdrive HL hack is one of many attacks that skilled auditors are trained to detect before deployment. Master real exploit patterns and defense techniques with hands-on Web3 security training.

Start Free Trial Browse Attack Library
Recreate exploit patterns safely Free Trial