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Optimism

Ethereum Layer 2 scaling solution using optimistic rollups with the OP Stack

OPETHLayer 2KYC RequiredPoC RequiredTriaged
Verified ProgramKYC RequiredPoC RequiredPrimacy of ImpactTriaged
Max Bounty$2,000,042
Min Bounty$1,000
PayoutUSDC
Findings0
Accepted0
Chains2
Live SinceJan 2022
Submit a Finding for Optimism โ†’

14 Audit Reports Available

2022-11-optimism-securityreview.pdfTrail of Bits
2022-11
Optimism-MtCannon-Spearbit-Security-Review-December-2024.pdfSpearbit
2024
Optimism-Spearbit-Security-Review-July-2025.pdfSpearbit
2025
Optimism-Spearbit-Security-Review-May-2025.pdfSpearbit
2025
Optimism-Upgrade-15a-Spearbit-Security-Review-April-2025.pdfSpearbit
2025
Optimism-Upgrade13-Spearbit-Security-Review-January-2025.pdfSpearbit
2025
Optimism-Verify-Upgrade16-Spearbit-Security-Review-September-2025.pdfSpearbit
2025
2023-01-optimism-judgingSherlock
2023-01
2023-03-optimism-judgingSherlock
2023-03
2024-07-optimism-findingsCode4rena
2024-07
Optimism SafetyCheckerConsensys Diligence
2021-03
OptimismHacken
Optimism Layer 2 Security Audit OP Labs 27 February 2025 - 01 March 2025Cantina
2025-Feb
Optimism Cycle 19 Security Review Optimism 22 January 2024 - 05 February 2024Cantina
2024-Jan

01Severity & Rewards

02Program Rules

  1. 01Proof of Concept is required for all submissions. Reports without a working PoC demonstrating the vulnerability will not be considered.
  2. 02KYC verification is required before bounty payout. Researchers must complete identity verification to receive rewards.
  3. 03This program follows Primacy of Impact โ€” valid findings are rewarded based on demonstrated impact regardless of whether the specific attack vector was previously known.
  4. 04Submissions are triaged by the security team. Expect initial response within 48 hours of submission.
  5. 05Only previously unreported vulnerabilities are eligible. Duplicate submissions will be closed.
  6. 06Vulnerabilities must be reported through the WhiteClaws platform. Public disclosure before resolution disqualifies the submission.
  7. 07Testing must not disrupt live protocol operations. Use mainnet forks or testnets for Proof of Concept execution.
  8. 08For Critical severity findings, the security team may arrange direct communication for expedited resolution.

โœ“ IN SCOPE

  • โ—OP Stack smart contracts
  • โ—L1 and L2 bridge contracts
  • โ—Fault proof system
  • โ—Cross-domain messaging
CRITICAL FUNCTIONS
proveWithdrawalTransaction()finalizeWithdrawalTransaction()depositTransaction()
HIGH FUNCTIONS
relayMessage()setGasConfig()disputeGame()

โœ• OUT OF SCOPE

  • โ—Frontend explorer
  • โ—Off-chain sequencer
  • โ—Third-party OP Stack chains

โ˜…Protocol Information

๐•Twitterโ†—
Resources
โ—†Websiteโ†—๐Ÿ“„Docsโ†—โŒฅGitHubโ†—โ—Statusโ†—๐Ÿ›กBounty Policyโ†—
Security Contacts
Securitysecurity@oplabs.co
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Bounty program indexed and verified by WhiteClawsProgram data sourced from on-chain analysis and public bounty disclosures.

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