CVE-2026-82393

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

Published: Aug 31, 2026Updated: Sep 9, 2026 Sources: CVE List NVDCWE-22

7.5HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:NPrivileges Required

None

UI:RUser Interaction

Required

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-22 CWE-73 CWE-94

Affected Products

pnpm

oss-project

pnpmLibrary

OSS Libraries / npm

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

4 techniques

Collection

Discovery

Execution

Initial Access

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References

https://github.com/pnpm/pnpm/security/advisories/GHSA-vq4v-j7r6-jq4m

github.com

https://github.com/pnpm/pnpm/pull/12872

github.com

https://github.com/pnpm/pnpm/pull/12890

github.com

and 4 more references View all →

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