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OpenAdvisories
High · 7.1 CVE-2026-55700 EUVD-2026-39487GHSA-v23m-ccfg-pq9h

pnpm: stage download writes outside destination via manifest version traversal

Published Jun 25, 2026 · Updated Jun 25, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
pnpm pnpm >= 11.3.0, < 11.5.3 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm pnpm >= 11.3.0, < 11.5.3 11.5.3 GHSA-v23m-ccfg-pq9h

References