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Harmony Protocol to Roll Back Network After Massive Exploit

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Harmony Protocol to Roll Back Network After Massive Exploit

Security·18 Aug 2026, 03:53 UTC·5 min readBITCOIN
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Evidence trailUpdated Aug 18, 2026, 3:53 AM UTC
  • 1CoinBatmi Newsroom
  • 2Bitcoin.com News

Research and market information only — not financial advice. Report a correction or contact [email protected].

cryptocurrency market intelligence visualization for: Harmony Protocol to Roll Back Network After Massive Exploit. CoinBatmi editorial illustration.
CoinBatmi feature visual — market neutral — Harmony Protocol to Roll Back Network After Massive Exploit

According to Bitcoin.com News on 2026-08-18, Following a security breach on Aug. The cited source reports that 12 where an attacker exploited verification vulnerabilities to illicitly mint 2.385 trillion tokens, Harmony Protocol is executing a full network rollback to Aug. 11. Token Inflation Developers behind the Harmony blockchain protocol announced A. CoinBatmi is publishing this as a source-grounded briefing because the report falls within our ongoing security coverage. The cited material is the basis for the facts in this update, while additional confirmation may still be needed.

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This briefing does not add an unverified transaction value, yield claim, price target, or timeline. Where the available report is limited, that limitation is intentional: preserving the distinction between a reported development and a confirmed fact is more useful than filling gaps with speculation.

The story remains relevant for readers tracking security. Continue to monitor the cited source, related official channels, and market data before making decisions based on the report. This article is an editorial summary of the linked external material and is not investment advice.

Key Takeaways
  • Harmony will roll back Shard 0 to block 92,730,034 and Shard 1 to block 94,978,278, both recorded at 23:25:37 UTC on August 11, discarding 109,126 regular transactions and 315 staking transactions.
  • ONE fell roughly 52% from its August 11 close of $0.001176 to a low of $0.0005735 on August 12; as of August 18 it trades at $0.0007858 with a market cap of $11.7 million, per CoinGecko.
  • Over 99.9% of the forged token flows have been traced to wallets or service boundaries, and Harmony is coordinating with exchanges, bridges, and law enforcement on recovery.

Frequently Asked Questions

+Why did Harmony choose a full rollback instead of selectively burning the forged tokens?

The forged ONE had already moved through exchanges, DEX pools, bridge contracts, and staking wallets. Selectively burning tokens at those destinations risked destroying funds belonging to unrelated users. A fixed-window rollback applies one rule to every transaction after the checkpoint, eliminating the forged state without requiring case-by-case intervention.

+What prevents the same exploit from recurring after the rollback?

Harmony patched the quorum verification (PR 5101) and the receipt spent-marker derivation in Mainnet v2026.1.1 on August 12, and client v2026.1.2 will reject the affected block hashes after restart. The critical condition is whether a majority of mainnet validators run the patched build. Until that is confirmed through explorer evidence of producing nodes upgrading, the legacy verification path remains a risk.

+How does this compare to the 2022 Horizon Bridge hack?

The 2022 incident involved compromised private keys controlling the Horizon Bridge, resulting in approximately $100 million stolen — attributed by the FBI to North Korea's Lazarus Group. The 2026 exploit targets Harmony's own consensus and cross-shard receipt code, producing unauthorized token supply rather than stealing bridge assets. Both, however, highlight recurring weaknesses in Harmony's infrastructure.

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