CVE-2026-82392
pnpm: Virtual store linker path traversal via unvalidated depPath name in lockfileToDepGraph
- State
- Published
- Severity
- 7.1 High
- Published
- Aug 31, 2026
- Updated
- Sep 1, 2026
- Reserved
- Aug 28, 2026
Description
pnpm is a package manager. Prior to 10.34.5 and from 11.0.0 until 11.11.0, pnpm parses the package name from attacker-controlled pnpm-lock.yaml packages keys with dp.parse(depPath).name and uses it without validation in deps/graph-builder/src/lockfileToDepGraph.ts and pnpm11/deps/graph-builder/src/lockfileToDepGraph.ts. The name reaches path.join(modules, pkgName), storeController.importPackage, and pnpm11/lockfile/to-pnp/src/index.ts, allowing package contents to be written outside node_modules when a user runs pnpm install. When dangerouslyAllowAllBuilds or a matching allowBuilds entry permits lifecycle scripts, the escaped package can execute code with the user's privileges. This issue is fixed in versions 10.34.5 and 11.11.0.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.1 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L | GitHub_M |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
pnpmpnpm |
|
References
- https://github.com/pnpm/pnpm/security/advisories/GHSA-c59q-g84q-2gj5
- https://github.com/pnpm/pnpm/pull/12872
- https://github.com/pnpm/pnpm/pull/12890
- https://github.com/pnpm/pnpm/commit/51300fd41c5e4c8f47635108e373cc3d1f324fa7
- https://github.com/pnpm/pnpm/commit/78e29fe5583a1e5d69ea05e414eff310f78d5ed9
- https://github.com/pnpm/pnpm/releases/tag/v10.34.5
- https://github.com/pnpm/pnpm/releases/tag/v11.11.0
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