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Vulnerability record · CVE-2026-55700 · published 25 June 2026

CVE-2026-55700: Pnpm path traversal vulnerability

Pnpm · Pnpm

pnpm is a package manager. From 11.3.0 until 11.5.3, `pnpm stage download` derived a local filename from registry-controlled package name and version fields. A crafted manifest could escape the selected download directory and overwrite another reachable file. The merged fix validates both fields, derives one safe filename, and verifies the final destination before writing. This vulnerability is fixed in 11.5.3.

7.1 CVSS 3.1 High EPSS 0.42% · top 66.5% CWE-22 · Path traversalCWE-73 · CWE-73
7.1CVSS 3.1 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
29 Jun 2026Last modified by NVD

Description

pnpm is a package manager. From 11.3.0 until 11.5.3, `pnpm stage download` derived a local filename from registry-controlled package name and version fields. A crafted manifest could escape the selected download directory and overwrite another reachable file. The merged fix validates both fields, derives one safe filename, and verifies the final destination before writing. This vulnerability is fixed in 11.5.3.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/pnpm/pnpm/pull/12303 Patch
https://github.com/pnpm/pnpm/security/advisories/GHSA-v23m-ccfg-pq9h ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-55700), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.