How much was lost in the GoonFi hack?

The GoonFi hack resulted in $254K in losses on March 28, 2026.

What attack technique was used in the GoonFi exploit?

The GoonFi exploit utilized Mispricing arbitrage. Understanding this attack vector is critical for smart contract auditors and developers building secure DeFi protocols.

How can developers prevent similar smart contract attacks?

Preventing smart contract hacks requires a combination of secure coding practices, thorough security audits, and understanding common attack vectors like reentrancy, oracle manipulation, and access control flaws. Smart Contract Hacking (SCH) provides hands-on training to help developers and auditors identify and prevent vulnerabilities before deployment.

GoonFi Hack

TOTAL LOST $254K

Low Mar 28, 2026 Mispricing arbitrage solana

Affected Chain solana Incident surface

Recovered - No recovery reported

All-Time Rank #1207 By amount stolen

Protocol Type Dexs Target category

Incident Overview

Prop AMM on Solana

Incident Report

Protocol / Project GoonFi

Date of Incident March 28, 2026

Affected Chain(s) solana

Attack Technique Mispricing arbitrage

Classification Protocol Logic

Primary Source View Post-Mortem

Protocol Information

Protocol Type Dexs

Smart Contract Language Solidity

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 mispricing arbitrage and Rust/Anchor program internals and the Solana account model

Capital Required Seed capital to cover Solana network fees and initial position setup

On-Chain Access Ability to interact with solana Solana programs and deploy a custom exploit program or signer account

Protocol Analysis Identification of the exploitable vulnerability in GoonFi's program logic - root cause: protocol logic

Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single Solana transaction (atomic across instructions)

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 Mispricing arbitrage audit checklist and test coverage

If you're auditing a protocol with similar architecture to GoonFi, these are the critical security checks that could have prevented this incident (March 2026).

Verify all logic paths related to Mispricing arbitrage 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.

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Sources & References

01
Source 1 https://x.com/cetipo/status/2037892924982038893

Threat Assessment

Severity Level

LOW

Attack Vector Mispricing arbitrage
Root Cause Protocol Logic
Year 2026

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