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 |
High[H04] Irrelevant proof contributions are acceptedOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportMedium[M01] Potential mismatch in allowed gas limit for sequenced and queued transactionsOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportMedium[M02] Pre-state root and transaction may not uniquely identify transitionsOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportMedium[M03] Initial state root cannot be challengedOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L01] Appending transactions to the Canonical Transaction Chain in specific blocks might unexpectedly failOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L02] Inaccessible code when retrieving Merkle rootsOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L03] Lack of input validationsOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L04] Merkle tree elements are overwrittenOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L05] Misleading and / or erroneous docstrings and commentsOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L06] Missing and / or incomplete docstringsOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportShow 10 more
Low[L07] Undocumented literal valuesOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L08] Unspecified behavior of OVM gas refund for revert flagsOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L09] Nuisance gas proportional to code size is charged unnecessarily when changing an accountOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L10] Unnecessary handling of single byte returned dataOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L11] Incorrect state transitioner indexOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L12] Inconsistent and error-prone storage references in proxy contractsOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L13] Inconsistent key slicing when computing trie rootOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L14] Branch node modification in Merkle Trie may deviate from specificationOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L15] Unnecessary use of assemblyOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L16] Incorrect parsing of booleans in RLP libraryOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportShow 4 more
Low[L17] Lookup key strings are not centrally definedOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L18] Lack of allowance front-running mitigation in ERC20 contractOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L19] Lack of event emissionsOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
The report gives no description here.
Open the reportLow[L20] Deployment risksOptimism Smart Contracts Audit · OpenZeppelin · 24 Nov 2021Not fixed
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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