CVE-2026-55700 | pnpm is a package manager. From 11.3.0 until 11.5.3, `pnpm s… | CVSS 7.1 HIGH

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.

Metadata

CVE ID: CVE-2026-55700
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-17 00:13 UTC
Published: 2026-06-25 16:47 UTC
Last updated: 2026-06-25 18:16 UTC
Primary CWE: CWE-22
CWE-22: Improper Limitation of a Pathname to a Restricted Di…
Vendor / Product: pnpm / pnpm
Sources: cve.org · NVD

Severity & Metrics

7.1 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
pnpm	pnpm	—	>= 11.3.0, < 11.5.3

Weakness (CWE)

CWE	Source	Description
CWE-22	cna	CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-73	cna	CWE-73: External Control of File Name or Path

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.1	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L

References (2)

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