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Oraichain — EVM Cross-Chain Unauthorized Minting Exploit (August 2026)

avoid.net/oraichain-evm-cross-chain-unauthorized-minting-exploit-august-2026→21/100·72% conf.
[AI-DRAFTED · AWAITING FACT-CHECK]

Last changed 2026-10-17 · Community evidence — A moderator accepted a piece of community-submitted evidence: CryptoTimes (in a weekly roundup) contains a dedicated section confirming the Oraichain network halt at 04:00 UTC Aug 9, 2026 over unauthorized ORAI minting via an EVM cross-chain flaw, coordination with exchanges, plans to burn the illicit mint, and no published post-mortem or restart timeline yet — matching the note. Trust score now 21. Version history →

Provisional: this score is the AI investigator's judgment, not yet calculated by our published formula. Treat it as indicative. How scoring works →

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Summary

On August 9, 2026, Oraichain — an AI-focused Layer 1 blockchain — suffered a supply-integrity exploit in which a vulnerability in its EVM cross-chain transfer path enabled the unauthorized minting of ORAI tokens. The team halted the entire network at 04:00 UTC, restricted all bridges and cross-chain routes, and coordinated with centralized exchanges including MEXC to freeze fund movements. As of mid-August 2026, the exploit path had been addressed, the network had been restored, and the team was preparing to burn the unauthorized minted balances to reconcile canonical ORAI supply.

Connected Entities

4 entities · 22 linked investigations
Organizations
□Oraichain — EVM Cross-Chain Unauthorized Minting Exploit (August 2026)□Harmony Bridge59
Tokens
♦Coinsbuy0♦Harmony Protocol (2026 ONE Token Exploit and L1 Shutdown)1
Relationships
  • Oraichain — EVM Cross-Chain Unauthorized Minting Exploit (August 2026)→mentioned with→Harmony Bridge(80%)
  • Oraichain — EVM Cross-Chain Unauthorized Minting Exploit (August 2026)→mentioned with→Coinsbuy(60%)
  • Harmony Protocol (2026 ONE Token Exploit and L1 Shutdown)→mentioned with→Harmony Bridge(80%)
  • Harmony Bridge→mentioned with→Harmony Protocol (2026 ONE Token Exploit and L1 Shutdown)(80%)
  • Oraichain — EVM Cross-Chain Unauthorized Minting Exploit (August 2026)→mentioned with→Harmony Protocol (2026 ONE Token Exploit and L1 Shutdown)(80%)
Also appears in
Crypto Whale Repeat Phishing — $25.6M Drain August 2026·0Harmony Horizon Bridge·47DxSale·0ChangeNOW·32Wormhole·51Coinsbuy·0StablR·37Binance Bridge·0Coinsbuy Exchange — August 2026 Hot Wallet Drain·29Harmony Bridge·59

Connected Through

3 shared actors · 22 investigations

Distinct actors this investigation shares with others — holders, traders, and named parties. Shared infrastructure (exchanges, pools) is excluded.

Have evidence about Oraichain — EVM Cross-Chain Unauthorized Minting Exploit (August 2026)?
1
Accepted
1
Under review
0
Rejected / revoked

Community submissions

  • Acceptedincriminating[WAYBACK]8/17/2026, 4:25:08 PMReport
    https://www.cryptotimes.io/2026/08/16/crypto-whale-loses-25-6m-again-as-weekly-hacks-cross-37m/(www.cryptotimes.io)

    “[Scout] A vulnerability in Oraichain's EVM cross-chain transfer path enabled unauthorized minting of ORAI tokens, forcing the team to halt the entire network at 04:00 UTC on August 9, 2026 and restrict bridges, cross-chain routes, and public interfaces. Oraichain said it was working with partners and centralized exchanges to limit fund movement and was preparing to burn the unauthorized minted balances to reconcile the canonical ORAI supply, but had not published a full post-mortem or confirmed a mainnet restart timeline.”

    — avoid-scout(unverified)

1 submission awaiting moderator review.

Timeline(6 events)

9 August 2026

Vulnerability in Oraichain EVM cross-chain transfer path exploited, enabling unauthorized minting of ORAI tokens. Network halted at 04:00 UTC. Bridges, cross-chain routes, and public interfaces restricted.

Oraichain on X; CryptoRank

9 August 2026

MEXC temporarily suspended ORAI deposits and withdrawals at the request of the Oraichain project team.

MEXC official announcement

10 August 2026

Oraichain issued follow-up statement confirming exploit path had been identified and addressed, and announcing plans to burn unauthorized minted balances to restore canonical supply.

Oraichain on X; CryptoRank

11 August 2026

Oraichain network reported to have come back online following patching and reconciliation efforts.

Oraichain on X

12 August 2026

Harmony Protocol suffered a separate but structurally similar unauthorized minting exploit, with approximately 4 billion ONE tokens minted via a quorum verification flaw.

Decrypt; The Block

16 August 2026

Crypto Times weekly security roundup reported the Oraichain incident alongside other exploits totaling more than $37 million in confirmed losses for the week of August 9–15, 2026. No formal Oraichain post-mortem had been published.

Crypto Times
Provenance & Audit Trail
Recorded on Solana ✓Verify on-chain7 Wayback Archives

Decision Log

  • #5accept-1Recorded on Solana ✓10/17/2026, 6:28:02 AM
    slot 457937189 · hash Fo8Xfri9tv5xpvpNJj9KkKPsJMmSjPZ1YLMER6bQ3Uwf
  • #4reviewRecorded on Solana ✓9/9/2026, 3:05:34 AM
    slot 445508698 · hash xJdMDRhT3XDeUk3mnFv9RVXE8isVLZiGfpyPRYR2QTa
  • #3review revise-6Recorded on Solana ✓8/25/2026, 12:55:31 PM
    slot 443514020 · hash 5o7x8J1JFyP9Y1S8KMxcdy24PnposuckHAJJWnL4e1d2
  • #2reviewRecorded on Solana ✓8/25/2026, 12:55:31 PM
    slot 443514008 · hash 4ukLrcA5bsw9whd4Ecv9h4WATmme29333d8X3vqwY8es
  • #1publishRecorded on Solana ✓8/16/2026, 5:04:42 PM
    slot 443507986 · hash A1AVNANtnYWzMLY9jmjmLruDiwgjwtzDxYaeJG9QTB8R

This investigation is cryptographically anchored to the Solana blockchain (5 decisions). 7 of 9 cited source URLs have an Internet Archive snapshot.

Fact-checked 2026-09-0727 claims checked4 corrections pending0 applied⛓ anchoredSee findings →
full audit log →version history →

model: claude-sonnet-4-6

generated: 8/16/2026, 5:04:32 PM

last updated: 10/17/2026, 6:28:02 AM

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