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CVE-2026-55698GHSA-W466-C33R-3GJP

pnpm: Project env lockfile can short-circuit package-manager resolution and execute lockfile-selected pnpm bytes

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 10.34.2, 11.5.3
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: total

Summary

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.

Timeline

  1. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: total

  2. CVE published
  3. Record last updated

Affected versions

  • pnpm pnpm

    fixed in 10.34.2; From 11.0.0 · fixed in 11.5.3

  • pnpmnpm

    fixed in 10.34.2

  • pnpmnpm

    From 11.0.0 · fixed in 11.5.3

References 1

GitHub · pnpm/pnpm