pnpm up to 10.34.4/11.0.0-11.10.x Lockfile Parser lockfileToDepGraph.ts dp.parse depPath escape output

Summaryinfo

A vulnerability identified as problematic has been detected in pnpm up to 10.34.4/11.0.0-11.10.x. This impacts the function dp.parse of the file deps/graph-builder/src/lockfileToDepGraph.ts of the component Lockfile Parser. This manipulation of the argument depPath causes escape output. This vulnerability appears as CVE-2026-82392. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in pnpm up to 10.34.4/11.0.0-11.10.x. It has been declared as problematic. Affected by this vulnerability is the function dp.parse of the file deps/graph-builder/src/lockfileToDepGraph.ts of the component Lockfile Parser. The manipulation of the argument depPath with an unknown input leads to a escape output vulnerability. The CWE definition for the vulnerability is CWE-116. The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved. As an impact it is known to affect integrity, and availability. The summary by CVE is:

pnpm is a package manager. Prior to 10.34.5 and from 11.0.0 until 11.11.0, pnpm parses the package name from attacker-controlled pnpm-lock.yaml packages keys with dp.parse(depPath).name and uses it without validation in deps/graph-builder/src/lockfileToDepGraph.ts and pnpm11/deps/graph-builder/src/lockfileToDepGraph.ts. The name reaches path.join(modules, pkgName), storeController.importPackage, and pnpm11/lockfile/to-pnp/src/index.ts, allowing package contents to be written outside node_modules when a user runs pnpm install. When dangerouslyAllowAllBuilds or a matching allowBuilds entry permits lifecycle scripts, the escaped package can execute code with the user's privileges. This issue is fixed in versions 10.34.5 and 11.11.0.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-82392 since 08/29/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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.

Upgrading to version 10.34.5 or 11.11.0 eliminates this vulnerability.

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Productinfo

Name

• pnpm

Version

• 10.34.0
• 10.34.1
• 10.34.2
• 10.34.3
• 10.34.4
• 11.0.0-11.0
• 11.0.0-11.1
• 11.0.0-11.2
• 11.0.0-11.3
• 11.0.0-11.4
• 11.0.0-11.5
• 11.0.0-11.6
• 11.0.0-11.7
• 11.0.0-11.8
• 11.0.0-11.9
• 11.0.0-11.10

Website

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

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