The json-jwt gem before 1.11.0 for Ruby lacks an element count during the splitting of a JWE string.
{ "nvd_published_at": "2019-11-12T15:15:00Z", "cwe_ids": [ "CWE-287" ], "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2019-11-14T15:24:51Z" }