CVE-2022-35916: Cross chain utilities for Arbitrum L2 see EOA calls as cross chain calls

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-08-01 · updated 2026-06-17
Weakness: CWE-669

Description

OpenZeppelin Contracts is a library for secure smart contract development. Contracts using the cross chain utilities for Arbitrum L2, `CrossChainEnabledArbitrumL2` or `LibArbitrumL2`, will classify direct interactions of externally owned accounts (EOAs) as cross chain calls, even though they are not started on L1. This issue has been patched in v4.7.2. Users are advised to upgrade. There are no known workarounds for this issue.

Affected products

openzeppelin-contracts: from 4.6.0 before 4.7.2 — fixed in 4.7.2
OpenZeppelin Contracts Upgradeable: from 4.6.0 before 4.7.2 — fixed in 4.7.2

How to fix

Upgrade to a fixed version: openzeppelin-contracts 4.7.2; OpenZeppelin Contracts Upgradeable 4.7.2. Check the vendor advisory for mitigations.

References

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