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.
History

Wed, 28 Jan 2026 18:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:*

Tue, 27 Jan 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 27 Jan 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 27 Jan 2026 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Pnpm
Pnpm pnpm
Vendors & Products Pnpm
Pnpm pnpm

Mon, 26 Jan 2026 22:15:00 +0000

Type Values Removed Values Added
Description 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, CI/CD pipelines that auto-install binary dependencies, and those who can overwrite config files, scripts, or other sensitive files leading to RCE. Version 10.28.1 contains a patch. 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.

Mon, 26 Jan 2026 22:00:00 +0000

Type Values Removed Values Added
Description 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, CI/CD pipelines that auto-install binary dependencies, and those who can overwrite config files, scripts, or other sensitive files leading to RCE. Version 10.28.1 contains a patch.
Title pnpm: Binary ZIP extraction allows arbitrary file write via path traversal (Zip Slip)
Weaknesses CWE-22
CWE-23
CWE-426
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-01-26T21:37:17.483Z

Updated: 2026-01-27T21:41:06.094Z

Reserved: 2026-01-16T21:02:02.902Z

Link: CVE-2026-23888

cve-icon Vulnrichment

Updated: 2026-01-27T21:41:02.369Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-26T22:15:56.047

Modified: 2026-01-28T17:47:32.307

Link: CVE-2026-23888

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-01-26T21:37:17Z

Links: CVE-2026-23888 - Bugzilla