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Tool Directory

CVE-2023-37478

CriticalPublished

pnpm incorrectly parses tar archives relative to specification

Published: Aug 1, 2023
Updated: Oct 10, 2024
Assigning CNA: GitHub_M
Evidence observed: Aug 8, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

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

EPSS probability estimate

1.2%

Low · next 30 days

Percentile: 66.6%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

pnpm is a package manager. It is possible to construct a tarball that, when installed via npm or parsed by the registry is safe, but when installed via pnpm is malicious, due to how pnpm parses tar archives. This can result in a package that appears safe on the npm registry or when installed via npm being replaced with a compromised or malicious version when installed via pnpm. This issue has been patched in version(s) 7.33.4 and 8.6.8.

Sources

CVE-2023-37478-DemoPoC
Proof-of-concept exploit for CVE-2023-37478, demonstrating a web application vulnerability with automated exploitation and information-gathering capabilities.
CVE-2023-37478_npm_vs_pnpmPoC
CVE-2023-37478 showcases how a difference in npm and pnpm install packages that could be exploited by a well crafted tar.gz packge. This repo shows a demo.

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