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CVE-2026-82393— pnpm: A tarball dependency's manifest `name` escapes node_modules → arbitrary file write/overwrite on install

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团队开源的一款高效的JavaScript包管理器。 pnpm 10.34.5之前版本和11.11.0之前版本存在安全漏洞，该漏洞源于对tarball依赖的package.json清单名称中的路径遍历验证不严，未验证名称导致路径拼接，包提取到node_modules之外，攻击者控制的文件可覆盖任意文件系统路径，可能导致代码执行。

CVSS 7.5 · High EPSS 0.63% · P49

Affected Version Matrix 2

VendorProduct Version RangeStatus
pnpm pnpm < 10.34.5 affected
>= 11.0.0, < 11.11.0 affected
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I. Basic Information for CVE-2026-82393

Vulnerability Information
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Vulnerability Title
pnpm: A tarball dependency's manifest `name` escapes node_modules → arbitrary file write/overwrite on install
Source: CVE Program / CVE List V5
Vulnerability Description
pnpm is a package manager. Prior to 10.34.5 and 11.11.0, pnpm accepts a scoped path traversal in a tarball dependency's package.json manifest name because pnpm11/resolving/npm-resolver/src/pickPackage.ts rejects slash characters only for unscoped names. During pnpm install, the unvalidated name reaches raw path joins in pnpm11/installing/deps-resolver/src/resolvePeers.ts, pnpm11/installing/deps-resolver/src/index.ts, and pnpm11/deps/graph-builder/src/lockfileToDepGraph.ts, causing package extraction outside node_modules and allowing attacker-controlled files to overwrite arbitrary filesystem paths even when --ignore-scripts is used. The overwrite can replace shell startup files, Git hooks, or installed package code and lead to code execution. This issue is fixed in versions 10.34.5, and 11.11.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
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团队开源的一款高效的JavaScript包管理器。 pnpm 10.34.5之前版本和11.11.0之前版本存在安全漏洞，该漏洞源于对tarball依赖的package.json清单名称中的路径遍历验证不严，未验证名称导致路径拼接，包提取到node_modules之外，攻击者控制的文件可覆盖任意文件系统路径，可能导致代码执行。
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 < 10.34.5 -

II. Public POCs for CVE-2026-82393

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III. Intelligence Information for CVE-2026-82393

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Patches & Fixes for CVE-2026-82393 (3)

Vendor Advisories for CVE-2026-82393 (1)

Vendor Pages for CVE-2026-82393 (2)

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-82393

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