PT-2026-52523 · Pnpm · Pnpm

Published 2026-06-25 · Updated 2026-06-25 · CVE-2026-55698

Mitre

CVSS v3.1

8.8

High

Base vector

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

pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm can persist package-manager bootstrap metadata in the first YAML document of pnpm-lock.yaml. Before the patch, direct pnpm execution trusted an already resolved packageManagerDependencies entry when the committed env lockfile contained matching pnpm and @pnpm/exe versions. A malicious repository could therefore commit package-manager lockfile package records and snapshots that bypassed fresh package-manager resolution, then cause pnpm to install and execute bytes selected by that committed lockfile state during automatic version switching. This vulnerability is fixed in 10.34.2 and 11.5.3.

Fix

Insufficient Verification of Data Authenticity

Weakness Enumeration

CWE-345

CWE-494

CWE-829

Related Identifiers

CVE-2026-55698

Affected Products

Pnpm

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-55698 · Security Note
• https://github.com/pnpm/pnpm/security/advisories/GHSA-w466-c33r-3gjp · Note