pnpm up to 10.28.1 path.join directories.bin path traversal

Summaryinfo

A vulnerability, which was classified as critical, was found in pnpm up to 10.28.1. This impacts the function path.join. Such manipulation of the argument directories.bin leads to path traversal. This vulnerability is referenced as CVE-2026-24131. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in pnpm up to 10.28.1. It has been rated as critical. Affected by this issue is the function path.join. The manipulation of the argument directories.bin with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-24131 since 01/21/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 10.28.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 17432ad5bbed5c2e77255ca6d56a1449bbcfd943 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-4653). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• pnpm

Version

• 10.28.0
• 10.28.1

License

• open-source

Website

• Product: https://github.com/pnpm/pnpm/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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