CVE-2026-23889

MEDIUM EPSS 34.7%
Published Jan 26, 20265mo ago · Modified Jun 17, 20261w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Jan 26, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago

Description

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 Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality None
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
34.7% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 2

VendorProductVersionRange
pnpmpnpm* <10.28.1
microsoftwindows*any

References 3

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

Remediation

  • github.com https://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0e8b8cdc968f228903ba0886f7c0
    Patch
  • github.com https://github.com/pnpm/pnpm/releases/tag/v10.28.1
    Patch