How much was lost in the Harmony hack?

The Harmony hack resulted in $3.2M in losses on August 18, 2026.

What attack technique was used in the Harmony exploit?

The specific attack technique used in the Harmony hack has not been formally classified. Review available post-mortems and on-chain data for technical details.

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.

Harmony Hack

TOTAL LOST $3.2M

Medium Aug 18, 2026

Affected Chain 2026 Incident surface

Recovered - No recovery reported

All-Time Rank #552 By amount stolen

Year 2026 Incident year

Incident Report

Protocol / Project Harmony

Date of Incident August 18, 2026

Primary Source View Post-Mortem

Market Context at Time of Hack

Token Price at Hack $0.00072444

Market Cap at Hack $10.8M

% of Market Cap Stolen 29.71%

What Auditors Should Check

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

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://rekt.news/harmony-rekt2

Threat Assessment

Severity Level

MEDIUM

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