CVE-2026-55698 — pnpm: Project env lockfile can short-circuit package-manager resolution and execute lockfile-selected pnpm bytes

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
pnpm / pnpm	affected < 10.34.2; affected >= 11.0.0, < 11.5.3

CWE

CWE-345, CWE-494, CWE-829

References

https://github.com/pnpm/pnpm/security/advisories/GHSA-w466-c33r-3gjp

ADP enrichment

CISA-ADP

No English description supplied.

https://github.com/pnpm/pnpm/security/advisories/GHSA-w466-c33r-3gjp