Moderate severityOSV Advisory· Published Jan 26, 2026· Updated Jan 27, 2026
pnpm has Path Traversal via arbitrary file permission modification
CVE-2026-24131
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
pnpmnpm | < 10.28.2 | 10.28.2 |
Affected products
2Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-v253-rj99-jwpqghsaADVISORY
- github.com/pnpm/pnpm/commit/17432ad5bbed5c2e77255ca6d56a1449bbcfd943ghsax_refsource_MISCWEB
- github.com/pnpm/pnpm/releases/tag/v10.28.2ghsax_refsource_MISCWEB
- github.com/pnpm/pnpm/security/advisories/GHSA-v253-rj99-jwpqghsax_refsource_CONFIRMWEB
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