vega-util prior to 1.13.1 allows manipulation of object prototype. The 'vega.mergeConfig' method within vega-util could be tricked into adding or modifying properties of the Object.prototype.
{ "nvd_published_at": "2020-03-09T16:15:00Z", "severity": "MODERATE", "cwe_ids": [ "CWE-1321", "CWE-20", "CWE-915" ], "github_reviewed": true, "github_reviewed_at": "2021-04-23T20:26:16Z" }