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cached-path-relative@1.0.2 vulnerabilities

Memoize the results of the path.relative function

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Direct Vulnerabilities

Known vulnerabilities in the cached-path-relative package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
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Prototype Pollution

cached-path-relative is a memoize the results of the path.relative function.

Affected versions of this package are vulnerable to Prototype Pollution via the cache variable that is set as {} instead of Object.create(null) in the cachedPathRelative function, which allows access to the parent prototype properties when the object is used to create the cached relative path. When using the origin path as __proto__, the attribute of the object is accessed instead of a path.

Note: This vulnerability derives from an incomplete fix in https://security.snyk.io/vuln/SNYK-JS-CACHEDPATHRELATIVE-72573

###PoC

let cpr = require("cached-path-relative");
process.chdir("tst");
cpr("__proto__", "polluted")
console.log({}.polluted);

//output: ../polluted

How to fix Prototype Pollution?

Upgrade cached-path-relative to version 1.1.0 or higher.

<1.1.0
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