pnpm up to 10.33.3/11.3.x path traversal

Summaryinfo

A vulnerability marked as critical has been reported in pnpm up to 10.33.3/11.3.x. Affected by this issue is some unknown functionality. The manipulation leads to path traversal. This vulnerability is traded as CVE-2026-50015. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in pnpm up to 10.33.3/11.3.x. This issue affects an unknown code. The manipulation 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 integrity, and availability. The summary by CVE is:

pnpm is a package manager. Prior to 10.34.0 and 11.4.0, pnpm's patch application pipeline (@pnpm/patch-package) performs no path validation on file paths extracted from .patch files. An attacker who contributes a malicious patch file via a pull request can write attacker-controlled content to or delete arbitrary files on the filesystem during pnpm install, as the user running the install. The diff --git header paths containing ../../ sequences traverse out of the package directory, and the traversal is difficult to catch in code review because patch file diff headers are opaque to most reviewers. This vulnerability is fixed in 10.34.0 and 11.4.0.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-50015 since 06/03/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 10.33.4 or 11.4.0 eliminates this vulnerability.

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Productinfo

Name

• pnpm

Version

• 10.33.0
• 10.33.1
• 10.33.2
• 10.33.3
• 11.0
• 11.1
• 11.2
• 11.3

Website

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

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