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CVE-2026-55700— pnpm: stage download writes outside destination via manifest version 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团队开源的一个包管理器。 pnpm 11.3.0至11.5.3之前版本存在安全漏洞，该漏洞源于 从注册表控制的包名和版本字段派生本地文件名，特制清单可能绕过选定下载目录并覆盖其他可访问文件。

CVSS 7.1 · High EPSS 0.42% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
pnpm pnpm >= 11.3.0, < 11.5.3 affected
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I. Basic Information for CVE-2026-55700

Vulnerability Information
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Vulnerability Title
pnpm: stage download writes outside destination via manifest version traversal
Source: CVE Program / CVE List V5
Vulnerability Description
pnpm is a package manager. From 11.3.0 until 11.5.3, `pnpm stage download` derived a local filename from registry-controlled package name and version fields. A crafted manifest could escape the selected download directory and overwrite another reachable file. The merged fix validates both fields, derives one safe filename, and verifies the final destination before writing. This vulnerability is fixed in 11.5.3.
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:L
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团队开源的一个包管理器。 pnpm 11.3.0至11.5.3之前版本存在安全漏洞，该漏洞源于`pnpm stage download`从注册表控制的包名和版本字段派生本地文件名，特制清单可能绕过选定下载目录并覆盖其他可访问文件。
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 >= 11.3.0, < 11.5.3 -

II. Public POCs for CVE-2026-55700

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III. Intelligence Information for CVE-2026-55700

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Patches & Fixes for CVE-2026-55700 (1)

Vendor Advisories for CVE-2026-55700 (1)

Same Patch Batch · pnpm · 2026-06-25 · 13 CVEs total

CVE-2026-50016 8.8 HIGH pnpm: Transitive dependency alias path traversal allows project path override via symlink
CVE-2026-55698 8.8 HIGH pnpm: Project env lockfile can short-circuit package-manager resolution and execute lockfi
CVE-2026-55487 7.5 HIGH pnpm: manifest identity spoof satisfies allowBuilds and runs attacker lifecycle
CVE-2026-55697 7.5 HIGH pnpm: Repository-controlled configDependencies can select a pacquet native install engine
CVE-2026-50015 7.3 HIGH pnpm: Arbitrary File Write/Delete via Malicious Patch File (Path Traversal)
CVE-2026-50021 6.8 MEDIUM pnpm: Integrity Check Bypass via Missing Lockfile Integrity Field
CVE-2026-50573 6.8 MEDIUM pnpm: Unsafe default behavior breaks integrity check
CVE-2026-55180 6.5 MEDIUM pnpm: Repository config can expand victim environment secrets into registry requests befor
CVE-2026-55699 6.5 MEDIUM pnpm: reserved bin name deletes PNPM_HOME during global remove
CVE-2026-50014 6.4 MEDIUM pnpm: Git Fetch Argument Injection via Lockfile resolution.commit
CVE-2026-48995 pnpm: Tarball hash of GitHub git dependencies is not stored in lockfile
CVE-2026-50017 pnpm binds unscoped user-level npm auth credentials to a repository-selected registry

IV. Related Vulnerabilities

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

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