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L2 Bridge Secure

arbitrumBridgeCross-chainLayer 2

Cross-chain bridge protocol securing $500M in assets. Critical vulnerabilities in bridge contracts qualify for maximum rewards.

89
Total Reports
81%
Resolved
1 day
Avg Response

Bounty Rewards

Critical
175,000–250,000 ETH
High
75,000–175,000 ETH
Medium
25,000–75,000 ETH
Low
1,000–25,000 ETH
Payments sent automatically via smart contract escrow upon report acceptance

Scope

In Scope

  • Bridge contracts
  • Relayer infrastructure
  • Admin functions

Out of Scope

  • Known issues
  • Gas optimizations

Recent Disclosures

Bridge replay attack via signature malleability

CRITICALtriaged
by CipherPhantom4/12/2026
+25 ETH

Found a bug?

Submit your vulnerability report and earn up to 250,000 ETH

Program Details

TypeBug Bounty
Chainarbitrum
CurrencyETH
Launched6/10/2023

Smart Contract Escrow

Funds locked at submission
Auto-payout on acceptance
DAO dispute resolution
On-chain reputation reward