Path Traversal in Pnpm
CVE-2026-24131
pnpm is a package manager. Prior to version 10.28.2, when pnpm processes a package's `directories.bin` field, it uses `path.join()` without validating the result stays within the package root. A malicious npm package can specify `"directories": {"bin": "../../../../tmp"}` to escape the package directory, causing pnpm to chmod 755 files at arbitrary locations. This issue only affects Unix/Linux/macOS. Windows is not affected (`fixBin` gated by `EXECUTABLE_SHEBANG_SUPPORTED`). Version 10.28.2 contains a patch.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (18.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Pnpm — versions < 10.28.2
Weakness classification (CWE)
References
- github.com/pnpm/pnpm/security/advisories/GHSA-v253-rj99-jwpq (Exploit, Vendor Advisory)
- github.com/pnpm/pnpm/commit/17432ad5bbed5c2e77255ca6d56a1449bbcfd943 (Patch)
- github.com/pnpm/pnpm/releases/tag/v10.28.2 (Release Notes)
Frequently asked questions
- What is CVE-2026-24131?
- CVE-2026-24131 is a medium-severity vulnerability in Pnpm, classified under Path Traversal. CVSS score: 5.5/10. Published 2026-01-26.
- How severe is CVE-2026-24131?
- Medium severity. CVSS v3 base score is 5.5 out of 10.