CVE-2026-55698

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.

• CWE-345
• CWE-494
• CWE-829

• https://github.com/pnpm/pnpm/security/advisories/GHSA-w466-c33r-3gjpExploit, Vendor Advisory
• https://github.com/pnpm/pnpm/security/advisories/GHSA-w466-c33r-3gjpExploit, Vendor Advisory

Published

Jun 25, 2026

Last Modified

Jun 30, 2026

Status

Analyzed

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