Storage-layout collision risk across upgrades

Frax Finance's assessment for RD-F-142 — scored yellow on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

frxUSD uses TransparentUpgradeableProxy — upgrade April 2, 2026 occurred. No OZ upgrades-plugin storage-layout collision check report found publicly. frx-OFT-upgradeable uses ProxyAdmin across 25+ chains — storage layout compatibility not confirmed. Storage layout collision risk present but unquantified.

Sources #

Etherscan
Frax USD (frxUSD) | EtherscanfrxUSD proxy 0xcacd6fd2 TransparentUpgradeableProxy — upgrade April 2, 2026retrieved 2026-05-17
GitHub
FraxFinance/frax-oft-upgradeable | GitHubfrax-oft-upgradeable — ProxyAdmin pattern for cross-chain OFT adaptersretrieved 2026-05-17

Methodology #

Determine whether the OZ upgrades-plugin or manual review flags a storage-layout collision risk between implementation versions.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol frax factor RD-F-142 score yellow collected_at 2026-05-16 20:44:31