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CVE-2026-23889— pnpm has Windows-specific tarball Path Traversal

Quick assessment

Affected
pnpm pnpm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

pnpm是pnpm开源的一个包管理器。 pnpm 10.28.1之前版本存在路径遍历漏洞，该漏洞源于tarball提取存在路径遍历，可能导致恶意包在Windows系统上的包目录外写入文件。

CVSS 6.5 · Medium EPSS 0.49% · P40
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I. Basic Information for CVE-2026-23889

Vulnerability Information
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Vulnerability Title
pnpm has Windows-specific tarball Path Traversal
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
pnpm 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pnpm是pnpm开源的一个包管理器。 pnpm 10.28.1之前版本存在路径遍历漏洞，该漏洞源于tarball提取存在路径遍历，可能导致恶意包在Windows系统上的包目录外写入文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pnpm pnpm < 10.28.1 -

II. Public POCs for CVE-2026-23889

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III. Intelligence Information for CVE-2026-23889

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Same Patch Batch · pnpm · 2026-01-26 · 5 CVEs total

CVE-2026-23890 6.5 MEDIUM pnpm scoped bin name Path Traversal allows arbitrary file creation outside node_modules/.b
CVE-2026-23888 6.5 MEDIUM pnpm: Binary ZIP extraction allows arbitrary file write via path traversal (Zip Slip)
CVE-2026-24056 pnpm has symlink traversal in file:/git dependencies
CVE-2026-24131 pnpm has Path Traversal via arbitrary file permission modification

IV. Related Vulnerabilities

Same product: pnpm
Same vendor: pnpm
Same weakness: CWE-22

V. Comments for CVE-2026-23889

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