cve.bz

CVE-2023-49798

7.5 highEPSS 0.5%

High (7.5) in openzeppelin. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in @openzeppelin/contracts 4.9.5.

OpenZeppelin Contracts is a library for smart contract development. A merge issue when porting the 5.0.1 patch to the 4.9 branch caused a line duplication. In the version of `Multicall.sol` released in `@openzeppelin/contracts@4.9.4` and `@openzeppelin/contracts-upgradeable@4.9.4`, all subcalls are executed twice. Concretely, this exposes a user to unintentionally duplicate operations like asset transfers. The duplicated delegatecall was removed in version 4.9.5. The 4.9.4 version is marked as deprecated. Users are advised to upgrade. There are no known workarounds for this issue.

Severity

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
0.5% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-31)
CWE
CWE-670
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-699g-q6qh-q4v8npm@openzeppelin/contracts>=4.9.4 <4.9.54.9.5
GHSA-699g-q6qh-q4v8npm@openzeppelin/contracts-upgradeable>=4.9.4 <4.9.54.9.5

References

Check your stackJSON