TI-2026-19246 Aliases CVE-2026-23888 GHSA-6pfh-p556-v868

pnpm: Binary ZIP extraction allows arbitrary file write via path traversal (Zip Slip)

MEDIUM 62CWE-22Published 2026-01-26 · Updated 2026-01-27

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: None · High · None
Fix status: Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-426.

Summary

pnpm is a package manager. Prior to version 10.28.1, a path traversal vulnerability in pnpm's binary fetcher allows malicious packages to write files outside the intended extraction directory. The vulnerability has two attack vectors: (1) Malicious ZIP entries containing `../` or absolute paths that escape the extraction root via AdmZip's `extractAllTo`, and (2) The `BinaryResolution.prefix` field is concatenated into the extraction path without validation, allowing a crafted prefix like `../../evil` to redirect extracted files outside `targetDir`. The issue impacts all pnpm users who install packages with binary assets, users who configure custom Node.js binary locations and CI/CD pipelines that auto-install binary dependencies. It can lead to overwriting config files, scripts, or other sensitive files leading to RCE. Version 10.28.1 contains a patch.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.0045 39th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Partial pnpm (pnpm): 10.28.1pnpm (npm): 10.28.1Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

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 10.28.1	10.28.1	Patch available	CNA
—	pnpm (npm)	before 10.28.1	10.28.1	Patch available	GHSA-6pfh-p556-v868

pnpm Vendorpnpm Affected before 10.28.1 Fixed in 10.28.1 Patch available CNA
pnpm (npm) Vendor— Affected before 10.28.1 Fixed in 10.28.1 Patch available GHSA-6pfh-p556-v868

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:pnpm:pnpm::::::node.js::*	before 10.28.1	Vulnerable	pnpm

cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:* Versions before 10.28.1 Vulnerable ·pnpm

Remediation

Fix · CNA pnpm (pnpm) Fixed in 10.28.1
Fix · GHSA-6pfh-p556-v868 pnpm (npm) Fixed in 10.28.1 Advisory →

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat JBoss Enterprise Application Platform 8	Affected	No fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform Expansion Pack	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-23888
2026-10-03 Alias added: GHSA-6pfh-p556-v868

References

Other 2

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-2026-40212 pnpm: Project env lockfile can short-circuit package-manager resolution and execute lockfile-selected pnpm bytes CVSS 3.1HIGH 8.8
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

See all 27 →

Sources

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