CVE-2026-24131: Pnpm

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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 Pnpm: before 10.28.2 (fixed in 10.28.2)

Published 2026-01-26. Last modified 2026-06-17.