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
Upgrade to versions 13.1.2, 15.0.1, 18.1.1 or later.