npm package report

Is @openzeppelin/contracts safe?

@openzeppelin/contracts (npm) has 21 known vulnerabilities, the worst rated CRITICAL. Upgrade to 5.4.0 or later to clear all of them. No malicious-package signal is recorded.

// reach

0 direct dependencies

none carry a known advisory

1 packages depend on it

an advisory here reaches each of them

@turnkey/viem

Create a free accountfor every dependency path, dependent and what to upgrade

// ai model usage

Tracked for PyPI packages. HuggingFace models declare Python dependencies, so npm packages are not covered.

cvss

9.8

critical

CVSS v3.1 base score out of 10

epss

1.5%

medium

chance of exploitation in 30 days, 74th percentile of all CVEs

xyz score

4.0

medium

CyberXYZ composite out of 10

fig. 01 — GHSA-5vp3-v4hc-gx76, the advisory selected below

// 21 advisories

GHSA-5vp3-v4hc-gx76

CRITICALGitHub ratingCVE-2021-41264

Upgradeable contracts using UUPSUpgradeable may be vulnerable to an attack affecting uninitialized implementation contracts.

Full advisory text at GitHub advisory or NVD.

// cvss v3.1 vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

// questions

Is @openzeppelin/contracts safe to install?

CyberXYZ does not call a package safe in absolute terms. It records 21 known vulnerabilities for @openzeppelin/contracts (npm), the worst rated CRITICAL, and no malicious-package signal. Whether it is acceptable depends on the version you run.

Does @openzeppelin/contracts have known vulnerabilities?

Yes. CyberXYZ records 21 known vulnerabilities for @openzeppelin/contracts (npm), the worst rated CRITICAL. These include GHSA-5vp3-v4hc-gx76, GHSA-fg47-3c2x-m2wr, GHSA-93hq-5wgc-jc82, GHSA-4h98-2769-gh6h, GHSA-xrc4-737v-9q75.

Which version of @openzeppelin/contracts should I use?

5.4.0 or later clears every advisory recorded for @openzeppelin/contracts (npm). Check the release you pick before installing it.

How do I check @openzeppelin/contracts before installing?

Search @openzeppelin/contracts in CyberXYZ Check at https://cyberxyz.io/check?q=%40openzeppelin%2Fcontracts. The xyz Scanner checks a project's dependencies, and CyberXYZ Proxy checks each package as it is installed.

Checked 2026-11-14 at 10:44 UTC. The most recent advisory here was published 2025-07-17. Updated continuously from NVD, GHSA, OSV and CNA feeds.