The json-jwt gem before 1.11.0 for Ruby lacks an element count during the splitting of a JWE string.
{ "versions": [ { "introduced": "0" }, { "fixed": "1.11.0" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-18848.json"
[ { "events": [ { "introduced": "0" }, { "last_affected": "9.0" } ] } ]