TI-2026-40212 Aliases CVE-2026-55698 GHSA-w466-c33r-3gjp

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

HIGH 73CWE-345Published 2026-06-25 · Updated 2026-06-26

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Security bypass, Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-345 and CWE-494.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00297 22nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed pnpm (pnpm): 10.34.2, 11.5.3pnpm (npm): 10.34.2, 11.5.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
pnpm	pnpm	before 10.34.2; 11.0.0 to before 11.5.3	10.34.2, 11.5.3	Patch available	CNA
—	pnpm (npm)	before 10.34.2	10.34.2	Patch available	GHSA-w466-c33r-3gjp
—	pnpm (npm)	11.0.0 to before 11.5.3	11.5.3	Patch available	GHSA-w466-c33r-3gjp

pnpm Vendorpnpm Affected before 10.34.2; 11.0.0 to before 11.5.3 Fixed in 10.34.2, 11.5.3 Patch available CNA
pnpm (npm) Vendor— Affected before 10.34.2 Fixed in 10.34.2 Patch available GHSA-w466-c33r-3gjp
pnpm (npm) Vendor— Affected 11.0.0 to before 11.5.3 Fixed in 11.5.3 Patch available GHSA-w466-c33r-3gjp

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:pnpm:pnpm::::::node.js::*	before 10.34.2; 11.0.0 to before 11.5.3	Vulnerable	pnpm

cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:* Versions before 10.34.2; 11.0.0 to before 11.5.3 Vulnerable ·pnpm

Remediation

Fix · CNA pnpm (pnpm) Fixed in 10.34.2, 11.5.3
Fix · GHSA-w466-c33r-3gjp pnpm (npm) Fixed in 10.34.2 Advisory →
Fix · GHSA-w466-c33r-3gjp pnpm (npm) Fixed in 11.5.3 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 4 products

Red Hat AMQ Broker 7
Red Hat Build of Keycloak
Red Hat JBoss Enterprise Application Platform 8
Red Hat JBoss Enterprise Application Platform Expansion Pack

Timeline

2026-10-02 Threatist record created from CVE-2026-55698
2026-10-03 Alias added: GHSA-w466-c33r-3gjp

References

TI-2025-42715 pnpm v10+ Bypass "Dependency lifecycle scripts execution disabled by default" CVSS 3.1CRITICAL 9.8
TI-2023-19086 pnpm incorrectly parses tar archives relative to specification CVSS 3.1CRITICAL 9.8
TI-2026-40211 pnpm: Repository-controlled configDependencies can select a pacquet native install engine CVSS 3.1HIGH 8.8
TI-2026-40042 pnpm: manifest identity spoof satisfies allowBuilds and runs attacker lifecycle CVSS 3.1HIGH 8.8
TI-2026-36842 pnpm: Transitive dependency alias path traversal allows project path override via symlink replacement CVSS 3.1HIGH 8.8
TI-2025-42714 pnpm Lockfile Integrity Bypass Allows Remote Dynamic Dependencies CVSS 3.1HIGH 8.8

See all 27 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences