Optimism security record
As of 14 Oct 2026, Optimism has 2 audit reports by 2 security firms on Trustblock; the latest is by OpenZeppelin, dated 24 Nov 2021. Those reports list no open critical findings.
Record last updated . It holds audits and findings, contracts and incidents up to Oct 2026. Statuses are the security firms’ own. Trustblock does not review code.
Audits2
Newest first
| Audit | Security firm | Date | Scope | Critical findings | Report |
|---|---|---|---|---|---|
| Optimism Smart Contracts Audit | Security firm: OpenZeppelin | Date: | Scope: Files named in the report | 4 critical findings, fixed | Open · blog.openzeppelin.com |
| Optimism SafetyChecker | Security firm: Consensys | Date: | Scope: Not recorded. See the report | No open critical findings | Open · diligence.security |
Findings34
Statuses are the security firm’s own, from each report.
| Severity | Open | Acknowledged | Fixed |
|---|---|---|---|
| Critical | 0 | 0 | 4 |
| High | 1 | 0 | 4 |
| Medium | 3 | 0 | 2 |
| Low | 20 | 0 | 0 |
Critical[C01] Possible state manipulation after execution of transactions with invalid gas limitOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Fixed
The report gives no description here.
Open the reportCritical[C02] Partially shared keys with EXTENSION nodes mishandledOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Fixed
The report gives no description here.
Open the reportCritical[C03] Unbounded nuisance gasOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Fixed
The report gives no description here.
Open the reportCritical[C04] Valid L1-to-L2 queue transactions may be proven fraudulent spoofing queue originOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Fixed
The report gives no description here.
Open the reportHigh[H01] Valid transactions cannot be enqueuedOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Fixed
The report gives no description here.
Open the reportHigh[H02] Unhandled transfer failuresOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Fixed
The report gives no description here.
Open the reportHigh[H03] Relayers may not receive transaction feesOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Fixed
The report gives no description here.
Open the reportHigh[H05] Repeatedly exceeding nuisance gas limitOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Fixed
The report gives no description here.
Open the reportMedium[M04] Sequencer entrypoint contracts ignore success flags and returned dataOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Fixed
The report gives no description here.
Open the reportMedium[M05] Nuisance gas left is not reduced to zero when operation exceeds budgetOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Fixed
The report gives no description here.
Open the reportContracts
No deployed address is recorded for these audits.
The reports name a repository or files. Open a report to see its scope.
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