How much was lost in the Silo V2 hack?

The Silo V2 hack resulted in $392K in losses on April 03, 2026.

What attack technique was used in the Silo V2 exploit?

The Silo V2 exploit utilized Misconfigured Oracle Exploit. 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.

Silo V2 Hack

TOTAL LOST $392K

Low Apr 03, 2026 Misconfigured Oracle Exploit arbitrum

Affected Chain arbitrum Incident surface

Recovered - No recovery reported

All-Time Rank #1050 By amount stolen

Auditors 1 Prior security audit

Incident Overview

Silo Finance creates permissionless and risk-isolated lending markets.

This is classified as a Oracle Manipulation & Price Manipulation . Compare similar hacks →

Incident Report

Protocol / Project Silo V2

Date of Incident April 03, 2026

Affected Chain(s) arbitrum

Attack Technique Misconfigured Oracle Exploit

Classification Protocol Logic

Primary Source View Post-Mortem

Protocol Information

Protocol Type Lending

Smart Contract Language Solidity

Official Website app.silo.finance

Protocol Twitter/X @SiloFinance

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 misconfigured oracle exploit and Solidity and EVM internals

Capital Required Seed capital to cover gas and initial position setup

On-Chain Access Ability to interact with arbitrum smart contracts and deploy a custom exploit contract

Protocol Analysis Identification of the exploitable vulnerability in Silo V2's contract logic - root cause: protocol logic

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? Yes — skilled auditors routinely flag Misconfigured Oracle Exploit vulnerabilities in code review

Audited by Audit Report 1 — still lost $392K. Prior audits don't guarantee safety, especially after post-audit code changes.

If you're auditing a protocol with similar architecture to Silo V2, these are the critical security checks that could have prevented this incident (April 2026).

Verify all logic paths related to Misconfigured Oracle Exploit are guarded by proper access controls and input validation - see the Oracle Manipulation & Price Manipulation attack class for patterns
Audit oracle price feeds for manipulation risks - ensure time-weighted average prices (TWAPs) or multi-source aggregators are used, not spot prices
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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Security Audit History

Audit Report 1 Report

Related Attack Classes

The technique used in this hack maps to these vulnerability classes in our security curriculum:

See all Oracle Manipulation & Price Manipulation examples →

Oracle Manipulation & Price Manipulation

Sources & References

01
Source 1 https://x.com/yieldsandmore/status/2040188706309525857

Threat Assessment

Severity Level

LOW

Attack Vector Misconfigured Oracle Exploit
Root Cause Protocol Logic
Year 2026

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