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CVE-2026-82393

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

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.5 · High · EPSS 0.6% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • pnpm

    Versions
    • < 10.34.5: Affected
    • >= 11.0.0, < 11.11.0: Affected

    No fix published

  • pnpm npm

    Affected ranges
    • SEMVER: < 10.34.5

    Update to 10.34.5

  • pnpm npm

    Affected ranges
    • SEMVER: ≥ 11.0.0, < 11.11.0

    Update to 11.11.0

Original sources

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