pnpm up to 10.34.1/11.5.2 path traversal

Summaryinfo

A vulnerability, which was classified as critical, was found in pnpm up to 10.34.1/11.5.2. The affected element is an unknown function. Executing a manipulation can lead to path traversal. The identification of this vulnerability is CVE-2026-55699. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in pnpm up to 10.34.1/11.5.2. It has been declared as critical. This vulnerability affects some unknown functionality. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity, and availability. CVE summarizes:

pnpm is a package manager. Prior to 10.34.2 and 11.5.3, Manifest bin object keys such as "", ".", and ".." passed pnpm's bin-name guard. When a malicious package was installed globally, later global remove, update, or add-replacement flows could re-derive those names from the installed manifest and pass path.join(globalBinDir, binName) to removeBin. For "." this targets the global bin directory; for ".." this targets its parent. This vulnerability is fixed in 10.34.2 and 11.5.3.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-55699 since 06/17/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 10.34.2 or 11.5.3 eliminates this vulnerability.

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Productinfo

Name

• pnpm

Version

• 10.34.0
• 10.34.1
• 11.5.0
• 11.5.1
• 11.5.2

Website

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

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