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GHSA-p9pc-299p-vxgp

yargs-parser Vulnerable to Prototype Pollution

Source: GitHub Advisory Database (reviewed) Moderate CVE-2020-7608

Packages

EcosystemPackageAffectedFixed in
npm yargs-parser >= 6.0.0, < 13.1.2 13.1.2
npm yargs-parser >= 14.0.0, < 15.0.1 15.0.1
npm yargs-parser >= 16.0.0, < 18.1.1 18.1.1
npm yargs-parser < 5.0.1 5.0.1

Details

As written in the advisory (Markdown source, shown as plain text).

Affected versions of `yargs-parser` are vulnerable to prototype pollution. Arguments are not properly sanitized, allowing an attacker to modify the prototype of `Object`, causing the addition or modification of an existing property that will exist on all objects. Parsing the argument `--foo.__proto__.bar baz'` adds a `bar` property with value `baz` to all objects. This is only exploitable if attackers have control over the arguments being passed to `yargs-parser`. ## Recommendation Upgrade to versions 13.1.2, 15.0.1, 18.1.1 or later.

References

External links from the advisory. They lead to third-party sites.