---
id: CVE-2026-101044
title: >-
  pacquet, the Rust package-manager component shipped in the pnpm npm package
  versions >=12.0.0-alpha.0 and <12.0.0-alpha.5, does not validate dependency
  alias/name paths taken from a lockfile before using them in install-time
  filesystem j…
summary: >-
  pacquet, the Rust package-manager component shipped in the pnpm npm package
  versions >=12.0.0-alpha.0 and <12.0.0-alpha.5, does not validate dependency
  alias/name paths taken from a lockfile before using them in install-time
  filesystem j…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L'
cwe:
  - CWE-22
vendor: pnpm
product: pnpm
affected:
  - pnpm >= 12.0.0-alpha.0 < 12.0.0-alpha.5
published: '2026-09-27'
updated: '2026-09-27'
sourceUpdated: '2026-09-27T18:16:30.753'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101044'
references:
  - url: 'https://github.com/pnpm/pnpm/security/advisories/GHSA-2rx9-3g3h-c2jv'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/pacquet-before-12.0.0-alpha.5-path-traversal-via-lockfile-alias
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-27T17:56:02.212Z'
---

## Overview

pacquet, the Rust package-manager component shipped in the pnpm npm package versions >=12.0.0-alpha.0 and <12.0.0-alpha.5, does not validate dependency alias/name paths taken from a lockfile before using them in install-time filesystem joins. When a user installs a project with an attacker-supplied lockfile using --trust-lockfile or a frozen lockfile, alias entries containing path traversal segments (for example '../../escaped-link') are used when creating dependency and package links, bin destinations, hoisted entries, and virtual-store slots, allowing symlinks and directories to be created outside the intended project and node_modules boundary. Version 12.0.0-alpha.5 validates dependency names and every virtual-store slot path with a shared safe-join containment helper before any filesystem materialization, rejecting traversal, absolute, platform-specific, and reserved names with ERR_PNPM_INVALID_DEPENDENCY_NAME.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.