pnpm up to 10.34.1/11.5.2 pnpm-workspace.yaml os command injection

Summaryinfo

A vulnerability, which was classified as critical, has been found in pnpm up to 10.34.1/11.5.2. Impacted is an unknown function of the file pnpm-workspace.yaml. Performing a manipulation results in os command injection. This vulnerability was named CVE-2026-55697. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in pnpm up to 10.34.1/11.5.2. It has been classified as critical. This affects an unknown functionality of the file pnpm-workspace.yaml. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm can install configDependencies declared in pnpm-workspace.yaml before command dispatch. Before the patch, a repository could declare pacquet or @pnpm/pacquet as a config dependency and pnpm treated that repository-controlled dependency as an install-engine opt-in. During install, pnpm resolved a platform-specific @pacquet/<platform>-<arch>/pacquet binary from node_modules/.pnpm-config/<packageName> and spawned it as the developer or CI user. This vulnerability is fixed in 10.34.2 and 11.5.3.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-55697 since 06/17/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 325222 (pnpm < 10.34.2 / 11.x < 11.5.3 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 10.34.2 or 11.5.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (325222). Be aware that VulDB is the high quality source for vulnerability data.

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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Be aware that VulDB is the high quality source for vulnerability data.

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