What’s Vulnerable › Vulnerabilities

CVE-2026-24131: pnpm has Path Traversal via arbitrary file permission modification

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-26 · updated 2026-06-17
• Weakness: CWE-22

Description

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.

Affected products

• pnpm: before 10.28.2 — fixed in 10.28.2

How to fix

Upgrade to a fixed version: pnpm 10.28.2. Check the vendor advisory for mitigations.

References

• https://github.com/pnpm/pnpm/commit/17432ad5bbed5c2e77255ca6d56a1449bbcfd943
• https://github.com/pnpm/pnpm/releases/tag/v10.28.2
• https://github.com/pnpm/pnpm/security/advisories/GHSA-v253-rj99-jwpq

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