cve.bz

CVE-2023-40014

5.3 mediumEPSS 0.7%

Medium (5.3) in openzeppelin. EPSS 0.7% chance of exploitation in the next 30 days. Fixed in @openzeppelin/contracts 4.9.3.

OpenZeppelin Contracts is a library for secure smart contract development. Starting in version 4.0.0 and prior to version 4.9.3, contracts using `ERC2771Context` along with a custom trusted forwarder may see `_msgSender` return `address(0)` in calls that originate from the forwarder with calldata shorter than 20 bytes. This combination of circumstances does not appear to be common, in particular it is not the case for `MinimalForwarder` from OpenZeppelin Contracts, or any deployed forwarder the team is aware of, given that the signer address is appended to all calls that originate from these forwarders. The problem has been patched in v4.9.3.

Severity

CVSS 3.1

5.3 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS
0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-31)
CWE
CWE-116
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-g4vp-m682-qqmpnpm@openzeppelin/contracts>=4.0.0 <4.9.34.9.3
GHSA-g4vp-m682-qqmpnpm@openzeppelin/contracts-upgradeable>=4.0.0 <4.9.34.9.3

References

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