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Vulnerability · Published Aug 31, 2026 · Assigned by GitHub_M

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

High 7.5

In plain English

A high-severity path traversal in pnpm from pnpm. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 49.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npmpnpm10.34.5GHSA-vq4v-j7r6-jq4m
npmpnpm11.11.0GHSA-vq4v-j7r6-jq4m

Affected products (as reported)

VendorProductVersions
pnpm pnpm < 10.34.5>= 11.0.0, < 11.11.0

Weakness: CWE-22, CWE-73, CWE-94 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

References