pnpm: Virtual store linker path traversal via unvalidated depPath name in lockfileToDepGraph — GHSA-C59Q-G84Q-2GJ5

Summary

## Summary The virtual store linker constructs package installation directories using `path.join(modules, pkgName)` where `pkgName` is extracted from lockfile `packages` keys via `dp.parse(depPath).name` without validation. A crafted `pnpm-lock.yaml` with traversal sequences in depPath keys (e.g., `../../../tmp/pwned@1.0.0`) causes package content to be written to arbitrary filesystem paths during `pnpm install`.…

Timeline

Published by source

2026-09-02

Risk context

• Reported severity or threat level: high.
• Reported CVSS score: 7.1 out of 10.
• Reported EPSS value: 0.00397.
• Review exposure for the affected product or family: npm: pnpm.

Product

npm: pnpm

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-C59Q-G84Q-2GJ5

Source

GitHub

Vendor

GitHub

Published by source

2026-09-02

Last source activity

2026-09-02

Additional identifiers

CVE-2026-82392

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.