All versions of bson before 1.1.4 are vulnerable to Deserialization of Untrusted Data. The package will ignore an unknown value for an object's _bsontype, leading to cases where an object is serialized as a document rather than the intended BSON type.
{ "nvd_published_at": "2020-03-30T19:15:00Z", "cwe_ids": [ "CWE-502" ], "severity": "CRITICAL", "github_reviewed": true, "github_reviewed_at": "2021-05-06T23:40:10Z" }