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Hyperbridge (Polkadot-Ethereum Bridge)

avoid.net/hyperbridge-polkadot-ethereum-bridge→38/100·82% conf.
[AI-DRAFTED · AWAITING VERIFICATION]
anchored·YLMkmS…v3UA

Summary

Hyperbridge is a cross-chain interoperability bridge built by Polytope Labs, connecting Polkadot to Ethereum and EVM-compatible networks using zero-knowledge proof-based consensus verification. On April 13, 2026, an attacker exploited a Merkle Mountain Range (MMR) proof verification flaw in its Ethereum gateway contract, minting approximately 1 billion bridged DOT tokens and causing realized losses subsequently revised to $2.5 million across four EVM chains. The protocol was paused, underwent a full architectural rebuild rather than a patch, and relaunched in June 2026 with structural changes to governance, proof generation, and token architecture.

Connected Entities

1 entities · 10 linked investigations
Organizations
□Hyperbridge (Polkadot-Ethereum Bridge)
Relationships
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    Timeline(9 events)

    2024-09-11

    Hyperbridge raised $2.5 million seed round led by Web3 Foundation and Scytale Digital via the Polkadot Ecosystem Fund.

    CoinPaper

    2024-01-01

    Hyperbridge launched on Polkadot mainnet as a cross-chain interoperability bridge using zero-knowledge proof-based consensus verification.

    Hyperbridge Overview - Polkadot Wiki

    2025-04-17

    Polytope Labs reported raising over $5 million in total, including a $5.3 million seed round backed by the Polkadot Ecosystem Fund.

    TechCabal

    2026-04-13

    Attacker exploited MMR proof verification flaw in Hyperbridge's Ethereum gateway, minting approximately 1 billion bridged DOT tokens. Initial reported loss approximately $237,000. Gateway paused within hours.

    CoinDesk

    2026-04-16

    Hyperbridge revised total exploit losses to approximately $2.5 million, roughly ten times the initial estimate, after multi-chain forensic audit revealed losses across Ethereum, Arbitrum, Base, and BNB Chain incentive pools. Emergency bounds-validation patch deployed.

    Crypto Times

    2026-04-21

    Hyperbridge filed vulnerability disclosure with Parity Technologies after identifying identical bugs in two upstream ecosystem libraries.

    Hyperbridge Post-Mortem (official blog)

    2026-05-11

    SRLabs-audited version of patched codebase released; redeployment process began.

    Hyperbridge Post-Mortem (official blog)

    2026-05-15

    Hyperbridge launched a bug bounty program on HackenProof offering up to $50,000 for critical vulnerability disclosures. Over $150,000 reportedly paid to more than 20 researchers within the first week.

    Crypto Times

    2026-06-16

    Hyperbridge relaunched with full architectural rebuild including Hyperfungible Token standard, permissionless proof generation, decentralized governance, and LayerZero-compatible OFT adapter.

    Crypto Times
    Provenance & Audit Trail
    Anchored on SolanaVerify on-chain21 Wayback Archives

    Decision Log

    This investigation is cryptographically anchored to the Solana blockchain (1 event). 21 of 22 cited source URLs have an Internet Archive snapshot.

    full audit log →version history →

    model: claude-sonnet-4-6

    generated: 6/17/2026, 11:08:38 PM

    last updated: 7/28/2026, 11:20:13 AM

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