Path Traversal in Pnpm
CVE-2026-101044
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/pnpm/pnpm/security/advisories/GHSA-2rx9-3g3h-c2jv (vendor-advisory)
- www.vulncheck.com/advisories/pacquet-before-12.0.0-alpha.5-path-traversal-via-l… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-101044?
- CVE-2026-101044 is a high-severity vulnerability in Pnpm, classified under Path Traversal. CVSS score: 7.1/10. Published 2026-09-27.
- How severe is CVE-2026-101044?
- High severity. CVSS v3 base score is 7.1 out of 10.