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CVE-2026-23888— pnpm: Binary ZIP extraction allows arbitrary file write via path traversal (Zip Slip)

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之前版本存在代码问题漏洞，该漏洞源于二进制文件提取器存在路径遍历，可能导致恶意包在预期提取目录外写入文件。

CVSS 6.5 · Medium EPSS 0.46% · P38
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I. Basic Information for CVE-2026-23888

Vulnerability Information
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Vulnerability Title
pnpm: Binary ZIP extraction allows arbitrary file write via path traversal (Zip Slip)
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 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.
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 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pnpm是pnpm开源的一个包管理器。 pnpm 10.28.1之前版本存在代码问题漏洞，该漏洞源于二进制文件提取器存在路径遍历，可能导致恶意包在预期提取目录外写入文件。
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-2026-23888

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III. Intelligence Information for CVE-2026-23888

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Vendor Advisories for CVE-2026-23888 (1)

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-2026-23889 6.5 MEDIUM pnpm has Windows-specific tarball Path Traversal
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-2026-23888

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