All versions of package deeps up to and including version 1.4.5 are vulnerable to Prototype Pollution via the set function.
{ "nvd_published_at": "2020-09-01T10:15:00Z", "severity": "CRITICAL", "github_reviewed_at": "2021-05-05T18:56:42Z", "github_reviewed": true, "cwe_ids": [ "CWE-1321" ] }