CVE-2026-23889

pnpm is a package manager. Prior to version 10.28.1, a path traversal vulnerability in pnpm's tarball extraction allows malicious packages to write files outside the package directory on Windows. The path normalization only checks for `./` but not `.\`. On Windows, backslashes are directory separators, enabling path traversal. This vulnerability is Windows-only. This issue impacts Windows pnpm users and Windows CI/CD pipelines (GitHub Actions Windows runners, Azure DevOps). It can lead to overwriting `.npmrc`, build configs, or other files. Version 10.28.1 contains a patch.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0e8b8cdc968f228903ba0886f7c0	Patch
https://github.com/pnpm/pnpm/releases/tag/v10.28.1	Patch
https://github.com/pnpm/pnpm/security/advisories/GHSA-6x96-7vc8-cm3p	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:*

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-01-26 22:15

Updated : 2026-01-28 17:33

NVD link : CVE-2026-23889

Mitre link : CVE-2026-23889

CVE.ORG link : CVE-2026-23889

JSON object : View

Products Affected

microsoft

windows

pnpm

pnpm

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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